Vulnerability-Lookup

CVE-2026-68763 (GCVE-0-2026-68763)

Vulnerability from cvelistv5 – Published: 2026-08-25 22:00 – Updated: 2026-08-26 18:36

Title

Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset

Summary

Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 18:36 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/tv51ty39ppv41v04h…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/26/9

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.24 (semver) Affected: 10.1.0-M1 , ≤ 10.1.57 (semver) Affected: 9.0.39 , ≤ 9.0.120 (semver) Affected: 8.5.59 , ≤ 8.5.100 (semver) Unaffected: 0 , ≤ 7.0.109 (semver)	guessed

Credits

Zhen Kong

Show details on NVD website

JSON

To clipboard

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CERTFR-2026-AVI-1083

Vulnerability from certfr_avis - Published: 2026-08-26 - Updated: 2026-08-26

De multiples vulnérabilités ont été découvertes dans Apache Tomcat. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Apache	Tomcat	Tomcat versions 10.1.x antérieures à 10.1.59

References

Title

Publication Time

FKIE_CVE-2026-68763

Vulnerability from fkie_nvd - Published: 2026-08-25 22:17 - Updated: 2026-08-26 19:16

Severity

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

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/08/26/9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-82JR-6MFR-9VQ5

Vulnerability from github – Published: 2026-08-26 00:30 – Updated: 2026-08-26 21:31

Details

Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

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  "modified": "2026-08-26T21:31:39Z",
  "published": "2026-08-26T00:30:52Z",
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    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/26/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.
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-2026-68763 (GCVE-0-2026-68763)

CERTFR-2026-AVI-1083

Solutions

FKIE_CVE-2026-68763

GHSA-82JR-6MFR-9VQ5

Tags

Sightings

Nomenclature