Vulnerability-Lookup

CVE-2026-41082 (GCVE-0-2026-41082)

Vulnerability from cvelistv5 – Published: 2026-04-16 17:32 – Updated: 2026-07-08 12:05

Summary

In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-24 - Path Traversal: '../filedir'

Assigner

mitre

References

7 references

URL	Tags
https://github.com/ocaml/opam/releases/tag/2.5.1
https://github.com/ocaml/opam/pull/6897
https://osv.dev/vulnerability/OSEC-2026-03
https://lists.debian.org/debian-lts-announce/2026…
https://access.redhat.com/security/cve/CVE-2026-41082	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2459003	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

2 products

Vendor	Product	Version
OCaml	opam	Affected: 0 , < 2.5.1 (semver)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41082",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-16T16:10:19.452755Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-16T16:10:25.046Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://osv.dev/vulnerability/OSEC-2026-03"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-04-21T09:32:52.152Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-04-16T17:32:40.068Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in OCaml opam. A malicious package containing a crafted .install field with directory traversal sequences allows an attacker to write files to arbitrary locations, potentially overwriting system files and causing arbitrary code execution."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-24",
                "description": "Path Traversal: \u0027../filedir\u0027",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-08T12:05:53.163Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-41082"
          },
          {
            "name": "RHBZ#2459003",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459003"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-04-16T18:00:56.999Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-04-16T17:32:40.068Z",
            "value": "Made public."
          }
        ],
        "title": "ocaml-opam: path traversal via the .install field",
        "workarounds": [
          {
            "lang": "en",
            "value": "To mitigate this vulnerability, do not install packages from untrusted sources and manually inspect the .install field in the package source to make sure it does not contain malicious paths."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:opam/opam-format",
          "product": "opam",
          "vendor": "OCaml",
          "versions": [
            {
              "lessThan": "2.5.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-24",
              "description": "CWE-24 Path Traversal: \u0027../filedir\u0027",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-15T18:52:20.182Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/ocaml/opam/releases/tag/2.5.1"
        },
        {
          "url": "https://github.com/ocaml/opam/pull/6897"
        },
        {
          "url": "https://osv.dev/vulnerability/OSEC-2026-03"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-41082",
    "datePublished": "2026-04-16T17:32:40.068Z",
    "dateReserved": "2026-04-16T17:32:39.584Z",
    "dateUpdated": "2026-07-08T12:05:53.163Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-41082",
      "date": "2026-07-11",
      "epss": "0.00205",
      "percentile": "0.10576"
    },
    "microsoft_vex": {
      "current_release_date": "2026-05-19T01:48:22.000Z",
      "cve": "CVE-2026-41082",
      "id": "msrc_CVE-2026-41082",
      "initial_release_date": "2026-04-02T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-41082.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-41082\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2026-04-16T18:16:45.980\",\"lastModified\":\"2026-07-08T03:29:28.993\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"OCaml\",\"product\":\"opam\",\"defaultStatus\":\"unaffected\",\"packageURL\":\"pkg:opam/opam-format\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"2.5.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L\",\"baseScore\":7.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.5,\"impactScore\":4.7},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-16T16:10:19.452755Z\",\"id\":\"CVE-2026-41082\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-24\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-24\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ocaml:opam:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.5.1\",\"matchCriteriaId\":\"2E4D5E63-7CE1-40B8-B036-E8C9B09989BC\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C\"}]}]}],\"references\":[{\"url\":\"https://github.com/ocaml/opam/pull/6897\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/ocaml/opam/releases/tag/2.5.1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://osv.dev/vulnerability/OSEC-2026-03\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-41082\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2459003\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://osv.dev/vulnerability/OSEC-2026-03\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-08T03:35:13+00:00",
      "cve": "CVE-2026-41082",
      "id": "CVE-2026-41082",
      "initial_release_date": "2026-04-16T17:32:40.068000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ocaml-opam: path traversal via the .install field",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-04-21T09:32:52.152Z\"}}, {\"title\": \"ocaml-opam: path traversal via the .install field\", \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Important\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"defaultStatus\": \"affected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-04-16T18:00:56.999Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-04-16T17:32:40.068Z\", \"value\": \"Made public.\"}], \"x_adpType\": \"supplier\", \"datePublic\": \"2026-04-16T17:32:40.068Z\", \"references\": [{\"url\": \"https://access.redhat.com/security/cve/CVE-2026-41082\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2459003\", \"name\": \"RHBZ#2459003\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json\", \"tags\": [\"x_sadp-csaf-vex\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"To mitigate this vulnerability, do not install packages from untrusted sources and manually inspect the .install field in the package source to make sure it does not contain malicious paths.\"}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in OCaml opam. A malicious package containing a crafted .install field with directory traversal sequences allows an attacker to write files to arbitrary locations, potentially overwriting system files and causing arbitrary code execution.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-24\", \"description\": \"Path Traversal: \u0027../filedir\u0027\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-08T12:05:53.163Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-41082\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-16T16:10:19.452755Z\"}}}], \"references\": [{\"url\": \"https://osv.dev/vulnerability/OSEC-2026-03\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-16T18:37:06.220Z\"}}], \"cna\": {\"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.3, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"OCaml\", \"product\": \"opam\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"2.5.1\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:opam/opam-format\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/ocaml/opam/releases/tag/2.5.1\"}, {\"url\": \"https://github.com/ocaml/opam/pull/6897\"}, {\"url\": \"https://osv.dev/vulnerability/OSEC-2026-03\"}], \"x_generator\": {\"engine\": \"CVE-Request-form 0.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-24\", \"description\": \"CWE-24 Path Traversal: \u0027../filedir\u0027\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2026-06-15T18:52:20.182Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-41082\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-08T12:05:53.163Z\", \"dateReserved\": \"2026-04-16T17:32:39.584Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2026-04-16T17:32:40.068Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-41082

Vulnerability from fkie_nvd - Published: 2026-04-16 18:16 - Updated: 2026-07-08 03:29

Severity

7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Summary

In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.

References

URL	Tags
cve@mitre.org	https://github.com/ocaml/opam/pull/6897	Issue Tracking, Patch
cve@mitre.org	https://github.com/ocaml/opam/releases/tag/2.5.1	Release Notes
cve@mitre.org	https://osv.dev/vulnerability/OSEC-2026-03	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html	Mailing List, Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-41082	Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2459003	Issue Tracking
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://osv.dev/vulnerability/OSEC-2026-03	Third Party Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json	Third Party Advisory

Impacted products

Vendor	Product	Version
ocaml	opam	*
debian	debian_linux	11.0
redhat	enterprise_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:opam/opam-format",
          "product": "opam",
          "vendor": "OCaml",
          "versions": [
            {
              "lessThan": "2.5.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ocaml:opam:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2E4D5E63-7CE1-40B8-B036-E8C9B09989BC",
              "versionEndExcluding": "2.5.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory."
    }
  ],
  "id": "CVE-2026-41082",
  "lastModified": "2026-07-08T03:29:28.993",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 4.7,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41082",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-16T16:10:19.452755Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-16T18:16:45.980",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/ocaml/opam/pull/6897"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/ocaml/opam/releases/tag/2.5.1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://osv.dev/vulnerability/OSEC-2026-03"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-41082"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459003"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://osv.dev/vulnerability/OSEC-2026-03"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-24"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-24"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-97Q5-QF47-HVRW

Vulnerability from github – Published: 2026-04-16 18:31 – Updated: 2026-06-30 03:36

Details

In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-41082"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-24"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-16T18:16:45Z",
    "severity": "HIGH"
  },
  "details": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.",
  "id": "GHSA-97q5-qf47-hvrw",
  "modified": "2026-06-30T03:36:17Z",
  "published": "2026-04-16T18:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41082"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ocaml/opam/pull/6897"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-41082"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459003"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ocaml/opam/releases/tag/2.5.1"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00021.html"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/OSEC-2026-03"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41082.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-41082

Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-05-19 01:48

Summary

In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-41082

CWE-24 - Path Traversal: '../filedir'

Affected products

Known not affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-41082 In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-41082.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.",
    "tracking": {
      "current_release_date": "2026-05-19T01:48:22.000Z",
      "generator": {
        "date": "2026-05-19T07:48:17.715Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-41082",
      "initial_release_date": "2026-04-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-07T01:13:38.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-05-19T01:48:22.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "category": "product_name",
            "name": "azl3 ocaml-dune 0:3.15.2-1.azl3",
            "product": {
              "name": "azl3 ocaml-dune 0:3.15.2-1.azl3",
              "product_id": "1"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 ocaml-dune 0:3.15.2-1.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-41082",
      "cwe": {
        "id": "CWE-24",
        "name": "Path Traversal: \u0027../filedir\u0027"
      },
      "flags": [
        {
          "label": "component_not_present",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "mitre",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-41082 In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-41082.json"
        }
      ],
      "title": "In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory."
    }
  ]
}

osec-2026-03

Vulnerability from osv_ocaml

Published

2026-04-15 22:00

Modified

2026-04-16 21:00

Summary

opam install sandbox escape

Details

Summary

.install files do not validate whether they are inside the package area, and so can bypass sandboxing.

Exploit

In a package.install file, this installs a file as `~/.bashrc:

bin: [
  "payload.sh" {"../../../.bashrc"}
]

Timeline

2026-04-11: Anil forwarded the issue from Andrew Nesbitt to the OCaml security team
2026-04-11: Kate developed a fix
2026-04-15: opam 2.5.1 was released with the fix

Severity

5.7 (Medium)


                    
                      CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Credits

Andrew Nesbitt

Kate

Raja Boujbel

Hannes Mehnert

References

URL

Type

	https://github.com/ocaml/opam/pull/6897	FIX
	https://github.com/ocaml/opam/pull/6898	FIX

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "opam_constraint": "opam-devel {\u003c \"2.5.1\"}"
      },
      "package": {
        "ecosystem": "opam",
        "name": "opam-devel",
        "purl": "pkg:opam/opam-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d7283e3b5845447ee618794d87cfe224dd980c8f"
            }
          ],
          "repo": "https://github.com/ocaml/opam",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c8fcf65779fe7048f9b5ef59886bfa9c5d102d84"
            }
          ],
          "repo": "https://github.com/ocaml/opam",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.0~alpha5",
        "2.0.0~beta",
        "2.0.0~beta3",
        "2.0.0~beta3.1",
        "2.0.0~beta5",
        "2.0.0~rc",
        "2.0.0~rc2",
        "2.0.0~rc3",
        "2.0.0",
        "2.0.1",
        "2.0.2",
        "2.0.3",
        "2.0.4",
        "2.0.5",
        "2.0.6",
        "2.0.7",
        "2.0.8",
        "2.0.9",
        "2.0.10",
        "2.1.0~beta2",
        "2.1.0~beta4",
        "2.1.0~rc",
        "2.1.0~rc2",
        "2.1.0",
        "2.1.1",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.1.6",
        "2.2.0~alpha",
        "2.2.0~alpha2",
        "2.2.0~alpha3",
        "2.2.0~beta1",
        "2.2.0~beta2",
        "2.2.0~beta3",
        "2.2.0~rc1",
        "2.2.0",
        "2.2.1",
        "2.3.0~alpha1",
        "2.3.0~beta1",
        "2.3.0~beta2",
        "2.3.0~rc1",
        "2.3.0",
        "2.4.0~alpha1",
        "2.4.0~alpha2",
        "2.4.0~beta1",
        "2.4.0~rc1",
        "2.4.0",
        "2.4.1",
        "2.5.0~alpha1",
        "2.5.0~beta1",
        "2.5.0~rc1",
        "2.5.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41082"
  ],
  "credits": [
    {
      "name": "Andrew Nesbitt",
      "type": "REPORTER"
    },
    {
      "name": "Kate",
      "type": "REMEDIATION_DEVELOPER"
    },
    {
      "name": "Raja Boujbel",
      "type": "REMEDIATION_REVIEWER"
    },
    {
      "name": "Hannes Mehnert",
      "type": "COORDINATOR"
    }
  ],
  "database_specific": {
    "cwe": [
      "CWE-693"
    ],
    "human_link": "https://github.com/ocaml/security-advisories/tree/main/advisories/2026/OSEC-2026-03.md",
    "osv": "https://github.com/ocaml/security-advisories/tree/generated-osv/2026/OSEC-2026-03.json"
  },
  "details": "## Summary\n\n`.install` files do not validate whether they are inside the package area, and so can bypass sandboxing.\n\n## Exploit\n\nIn a `package.install` file, this installs a file as ``~/.bashrc`:\n```\nbin: [\n  \"payload.sh\" {\"../../../.bashrc\"}\n]\n```\n\n## Timeline\n\n- 2026-04-11: Anil forwarded the issue from Andrew Nesbitt to the OCaml security team\n- 2026-04-11: Kate developed a fix\n- 2026-04-15: opam 2.5.1 was released with the fix",
  "id": "OSEC-2026-03",
  "modified": "2026-04-16T21:00:00Z",
  "published": "2026-04-15T22:00:00Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/ocaml/opam/pull/6897"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ocaml/opam/pull/6898"
    }
  ],
  "schema_version": "1.7.4",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "opam install sandbox escape"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-41082 (GCVE-0-2026-41082)

FKIE_CVE-2026-41082

GHSA-97Q5-QF47-HVRW

MSRC_CVE-2026-41082

osec-2026-03

Vulnerability from osv_ocaml

Summary

Exploit

Timeline

Tags

Sightings

Nomenclature