CVE-2026-68763Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apache
- NVD analysis
- Analyzed
- Record last updated
- Aug 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apache Software Foundation Apache Tomcat apache_software_foundation:apache_tomcat (from the name) | 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; from 8.5.59 through 8.5.100; through 7.0.109 not affected | CNA record |
apache tomcat apache:tomcat | from 8.5.59 before 9.0.121; from 10.1.0 before 10.1.58; from 11.0.0 before 11.0.25 | NVD |
References
- https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzlvendor-advisory, mailing-list
- http://www.openwall.com/lists/oss-security/2026/08/26/9third-party-advisory, mailing-list
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.