Vulnerability-Lookup

ubuntu-cve-2026-12611

Vulnerability from osv_ubuntu

Published

2026-09-14 00:00

Modified

2026-09-14 00:00

Summary

Details

A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive. This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client. The race condition "resets" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.

Severity

8.7 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-12611	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-12611	REPORT
	https://github.com/jetty/jetty.project/security/a…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "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 HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive. This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client. The race condition \"resets\" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.",
  "id": "UBUNTU-CVE-2026-12611",
  "modified": "2026-09-14T00:00:00Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12611"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-12611"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-gpg9-4257-cfm3"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-12611"
  ]
}

CVE-2026-12611 (GCVE-0-2026-12611)

Vulnerability from cvelistv5 – Published: 2026-09-08 12:28 – Updated: 2026-09-09 10:15

Summary

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 13:22 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

eclipse mitre root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Eclipse Foundation	Eclipse Jetty	Affected: 12.1.0 , ≤ 12.1.10 (semver) Affected: 12.0.0 , ≤ 12.0.37 (semver) Affected: 11.00 , ≤ 11.0.31 (semver) Affected: 10.0.0 , ≤ 10.0.31 (semver) Affected: 9.4.36 , ≤ 9.4.63 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-12611",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T13:22:30.453358Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-09T10:15:48.299Z",
          "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": "12.1.10",
              "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": "11.00",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.0.31",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.4.63",
              "status": "affected",
              "version": "9.4.36",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive.\u003c/p\u003e\n\u003cp\u003eThis is caused by a race condition in the server when handling \u003ccode\u003eRST_STREAM\u003c/code\u003e frames and \u003ccode\u003eGOAWAY\u003c/code\u003e frames sent by the client.\u003c/p\u003e\n\u003cp\u003eThe race condition \"resets\" the \u003ccode\u003eHTTP2Flusher.terminated\u003c/code\u003e, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.\u003c/p\u003e"
            }
          ],
          "value": "A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive.\n\n\n\n\nThis is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client.\n\n\n\n\nThe race condition \"resets\" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400 Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-09-08T12:28:51.669Z",
        "orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
        "shortName": "eclipse"
      },
      "references": [
        {
          "url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-gpg9-4257-cfm3"
        }
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      "source": {
        "discovery": "UNKNOWN"
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      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
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    "cveId": "CVE-2026-12611",
    "datePublished": "2026-09-08T12:28:51.669Z",
    "dateReserved": "2026-06-18T11:34:22.081Z",
    "dateUpdated": "2026-09-09T10:15:48.299Z",
    "state": "PUBLISHED"
  },
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}

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.