Vulnerability-Lookup

CVE-2026-59139 (GCVE-0-2026-59139)

Vulnerability from cvelistv5 – Published: 2026-07-21 19:02 – Updated: 2026-07-22 19:16

Title

Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked

Summary

Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked. The attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap). A local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

CPANSec

References

2 references

URL	Tags
https://metacpan.org/release/EGOR/Data-ReqRep-Sha…
https://metacpan.org/release/EGOR/Data-ReqRep-Sha…	release-notes

Impacted products

1 product

Vendor	Product	Version
EGOR	Data::ReqRep::Shared	Affected: 0 , < 0.05 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-59139",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-22T19:16:20.997158Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-22T19:16:27.039Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Data-ReqRep-Shared",
          "product": "Data::ReqRep::Shared",
          "programFiles": [
            "reqrep.h"
          ],
          "programRoutines": [
            {
              "name": "reqrep_recv_locked"
            }
          ],
          "repo": "https://github.com/vividsnow/perl5-data-reqrep-shared",
          "vendor": "EGOR",
          "versions": [
            {
              "lessThan": "0.05",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap\u0027d segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot\u0027s offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-21T19:02:43.033Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Data::ReqRep::Shared 0.05 or later, which bounds the arena offset and length against the arena capacity before the copy."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade to 0.05, place the backing file in a directory writable only by the owning user, so a local peer cannot tamper with the segment contents the read path trusts."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-59139",
    "datePublished": "2026-07-21T19:02:43.033Z",
    "dateReserved": "2026-07-02T16:24:17.912Z",
    "dateUpdated": "2026-07-22T19:16:27.039Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-59139",
      "date": "2026-07-22",
      "epss": "0.00159",
      "percentile": "0.05496"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-59139\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-07-21T19:17:11.467\",\"lastModified\":\"2026-07-22T20:17:02.053\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\\n\\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap\u0027d segment and never bounded against the arena capacity (req_arena_cap).\\n\\nA local peer that can write the backing file can leave the header valid while poisoning a request slot\u0027s offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"vendor\":\"EGOR\",\"product\":\"Data::ReqRep::Shared\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Data-ReqRep-Shared\",\"programFiles\":[\"reqrep.h\"],\"programRoutines\":[{\"name\":\"reqrep_recv_locked\"}],\"repo\":\"https://github.com/vividsnow/perl5-data-reqrep-shared\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.05\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-22T19:16:20.997158Z\",\"id\":\"CVE-2026-59139\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"references\":[{\"url\":\"https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}"
  }
}

FKIE_CVE-2026-59139

Vulnerability from fkie_nvd - Published: 2026-07-21 19:17 - Updated: 2026-07-22 20:17

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Data-ReqRep-Shared",
          "product": "Data::ReqRep::Shared",
          "programFiles": [
            "reqrep.h"
          ],
          "programRoutines": [
            {
              "name": "reqrep_recv_locked"
            }
          ],
          "repo": "https://github.com/vividsnow/perl5-data-reqrep-shared",
          "vendor": "EGOR",
          "versions": [
            {
              "lessThan": "0.05",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap\u0027d segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot\u0027s offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process."
    }
  ],
  "id": "CVE-2026-59139",
  "lastModified": "2026-07-22T20:17:02.053",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59139",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-22T19:16:20.997158Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-21T19:17:11.467",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-3JGV-34P5-3FXV

Vulnerability from github – Published: 2026-07-21 21:32 – Updated: 2026-07-22 21:31

Details

Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.

The attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).

A local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.

Severity

9.1 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-59139"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T19:17:11Z",
    "severity": "CRITICAL"
  },
  "details": "Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap\u0027d segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot\u0027s offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.",
  "id": "GHSA-3jgv-34p5-3fxv",
  "modified": "2026-07-22T21:31:54Z",
  "published": "2026-07-21T21:32:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59139"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-59139 (GCVE-0-2026-59139)

FKIE_CVE-2026-59139

GHSA-3JGV-34P5-3FXV

Tags

Sightings

Nomenclature