Vulnerability-Lookup

CVE-2026-19203 (GCVE-0-2026-19203)

Vulnerability from cvelistv5 – Published: 2026-09-08 12:08 – Updated: 2026-09-08 14:21

Summary

A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling. This is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.

Severity

8.3 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 14:21 UTC

CWE

CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')

Assigner

eclipse mitre root

References

1 reference

URL	Tags
https://github.com/jetty/jetty.project/security/a…

Impacted products

1 product

Vendor	Product	Version	CPE status
Eclipse Foundation	Eclipse Jetty	Affected: 12.1.0 , ≤ 12.1.11 (semver) Affected: 12.0.0 , ≤ 12.0.37 (semver) Affected: 11.0.0 , ≤ 11.0.31 (semver) Affected: 10.0.0 , ≤ 10.0.31 (semver) Affected: 9.4.0 , ≤ 9.4.63 (semver)	guessed

Credits

https://github.com/yarocher

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-19203",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T14:21:37.718183Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T14:21:55.816Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Eclipse Jetty",
          "vendor": "Eclipse Foundation",
          "versions": [
            {
              "lessThanOrEqual": "12.1.11",
              "status": "affected",
              "version": "12.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "12.0.37",
              "status": "affected",
              "version": "12.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "11.0.31",
              "status": "affected",
              "version": "11.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.0.31",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.4.63",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/yarocher"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\u003c/p\u003e\n\u003cp\u003eThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.\u003c/p\u003e"
            }
          ],
          "value": "A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444 Inconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-08T12:08:37.576Z",
        "orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
        "shortName": "eclipse"
      },
      "references": [
        {
          "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
    "assignerShortName": "eclipse",
    "cveId": "CVE-2026-19203",
    "datePublished": "2026-09-08T12:08:37.576Z",
    "dateReserved": "2026-08-07T07:32:16.708Z",
    "dateUpdated": "2026-09-08T14:21:55.816Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-19203",
      "date": "2026-09-14",
      "epss": "0.00289",
      "percentile": "0.21355"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-19203\",\"sourceIdentifier\":\"emo@eclipse.org\",\"published\":\"2026-09-08T13:17:18.520\",\"lastModified\":\"2026-09-08T15:18:42.667\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\\n\\n\\n\\n\\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.\"}],\"affected\":[{\"source\":\"emo@eclipse.org\",\"affectedData\":[{\"vendor\":\"Eclipse Foundation\",\"product\":\"Eclipse Jetty\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"12.1.0\",\"lessThanOrEqual\":\"12.1.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"12.0.0\",\"lessThanOrEqual\":\"12.0.37\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"11.0.0\",\"lessThanOrEqual\":\"11.0.31\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"10.0.0\",\"lessThanOrEqual\":\"10.0.31\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"9.4.0\",\"lessThanOrEqual\":\"9.4.63\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"emo@eclipse.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-08T14:21:37.718183Z\",\"id\":\"CVE-2026-19203\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"emo@eclipse.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-444\"}]}],\"references\":[{\"url\":\"https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h\",\"source\":\"emo@eclipse.org\"}]}}",
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T16:33:40Z",
      "cve": "CVE-2026-19203",
      "id": "CVE-2026-19203",
      "initial_release_date": "2026-09-11T16:33:40Z",
      "product_status:known_affected": "203",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-19203",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-19203.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-19203\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-08T14:21:37.718183Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-08T14:21:47.443Z\"}}], \"cna\": {\"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"https://github.com/yarocher\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 8.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Eclipse Foundation\", \"product\": \"Eclipse Jetty\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.1.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"12.1.11\"}, {\"status\": \"affected\", \"version\": \"12.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"12.0.37\"}, {\"status\": \"affected\", \"version\": \"11.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"11.0.31\"}, {\"status\": \"affected\", \"version\": \"10.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"10.0.31\"}, {\"status\": \"affected\", \"version\": \"9.4.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.4.63\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.5\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\\n\\n\\n\\n\\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eA client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\u003c/p\u003e\\n\u003cp\u003eThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-444\", \"description\": \"CWE-444 Inconsistent interpretation of HTTP requests (\u0027HTTP Request/Response smuggling\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"e51fbebd-6053-4e49-959f-1b94eeb69a2c\", \"shortName\": \"eclipse\", \"dateUpdated\": \"2026-09-08T12:08:37.576Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-19203\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-08T14:21:55.816Z\", \"dateReserved\": \"2026-08-07T07:32:16.708Z\", \"assignerOrgId\": \"e51fbebd-6053-4e49-959f-1b94eeb69a2c\", \"datePublished\": \"2026-09-08T12:08:37.576Z\", \"assignerShortName\": \"eclipse\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-19203

Vulnerability from fkie_nvd - Published: 2026-09-08 13:17 - Updated: 2026-09-08 15:18

Severity

8.3 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	emo@eclipse.org	https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Eclipse Jetty",
          "vendor": "Eclipse Foundation",
          "versions": [
            {
              "lessThanOrEqual": "12.1.11",
              "status": "affected",
              "version": "12.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "12.0.37",
              "status": "affected",
              "version": "12.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "11.0.31",
              "status": "affected",
              "version": "11.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.0.31",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.4.63",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "emo@eclipse.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination."
    }
  ],
  "id": "CVE-2026-19203",
  "lastModified": "2026-09-08T15:18:42.667",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "emo@eclipse.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-19203",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-08T14:21:37.718183Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-08T13:17:18.520",
  "references": [
    {
      "source": "emo@eclipse.org",
      "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h"
    }
  ],
  "sourceIdentifier": "emo@eclipse.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "emo@eclipse.org",
      "type": "Secondary"
    }
  ]
}

GHSA-P2J5-5566-VPV9

Vulnerability from github – Published: 2026-09-08 15:31 – Updated: 2026-09-08 15:31

Details

This is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.

Severity

8.3 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19203"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-08T13:17:18Z",
    "severity": "HIGH"
  },
  "details": "A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.",
  "id": "GHSA-p2j5-5566-vpv9",
  "modified": "2026-09-08T15:31:53Z",
  "published": "2026-09-08T15:31:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19203"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

ubuntu-cve-2026-19203

Vulnerability from osv_ubuntu

Published

2026-09-09 00:00

Modified

2026-09-10 08:55

Summary

Details

(A client may issue specially crafted HTTP/1.1 chunked requests to a Je ...)

Severity

8.3 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-19203	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-19203	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-extra",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-extra-java",
            "binary_version": "6.1.26-1ubuntu1.2"
          },
          {
            "binary_name": "libjetty-java",
            "binary_version": "6.1.26-1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "jetty",
        "purl": "pkg:deb/ubuntu/jetty@6.1.26-1ubuntu1.2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.26-1ubuntu1",
        "6.1.26-1ubuntu1.1",
        "6.1.26-1ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjetty-extra",
            "binary_version": "6.1.26-5ubuntu0.1"
          },
          {
            "binary_name": "libjetty-extra-java",
            "binary_version": "6.1.26-5ubuntu0.1"
          },
          {
            "binary_name": "libjetty-java",
            "binary_version": "6.1.26-5ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "jetty",
        "purl": "pkg:deb/ubuntu/jetty@6.1.26-5ubuntu0.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.26-5",
        "6.1.26-5ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.2.14-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.2.14-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.2.14-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.2.14-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.2.14-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.15-1~18.04.1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.15-1~18.04.1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.2.22-2",
        "9.2.22-3",
        "9.2.23-1",
        "9.4.15-1~18.04.1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.26-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.26-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.26-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.26-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.4.18-2build2",
        "9.4.26-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.45-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.45-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.45-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.45-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.4.39-3",
        "9.4.44-2",
        "9.4.44-3",
        "9.4.44-4",
        "9.4.45-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.53-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.53-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.53-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.53-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.4.51-2",
        "9.4.53-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty12",
            "binary_version": "12.0.32-1"
          },
          {
            "binary_name": "libjetty12-extra-java",
            "binary_version": "12.0.32-1"
          },
          {
            "binary_name": "libjetty12-java",
            "binary_version": "12.0.32-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "jetty12",
        "purl": "pkg:deb/ubuntu/jetty12@12.0.32-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.0.17-3.1",
        "12.0.32-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "jetty9",
            "binary_version": "9.4.58-1"
          },
          {
            "binary_name": "libjetty9-extra-java",
            "binary_version": "9.4.58-1"
          },
          {
            "binary_name": "libjetty9-java",
            "binary_version": "9.4.58-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "jetty9",
        "purl": "pkg:deb/ubuntu/jetty9@9.4.58-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.4.57-1",
        "9.4.57-1.1",
        "9.4.58-1"
      ]
    }
  ],
  "aliases": [],
  "details": "(A client may issue specially crafted HTTP/1.1 chunked requests to a Je ...)",
  "id": "UBUNTU-CVE-2026-19203",
  "modified": "2026-09-10T08:55:51Z",
  "published": "2026-09-09T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-19203"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-19203"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-19203"
  ]
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-19203 (GCVE-0-2026-19203)

FKIE_CVE-2026-19203

GHSA-P2J5-5566-VPV9

ubuntu-cve-2026-19203

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature