GHSA-9xv2-5v5q-p794: org.apache.tomcat:tomcat (CVE-2026-65905)

Apache Tomcat's DIGEST authenticator has an Authentication Bypass by Capture-replay vulnerability

CVSS 9.8 CriticalCriticalEPSS 0.0076 · 55th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

Published by the GitHub Advisory Database at 26 Aug 2026, 00:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
org.apache.tomcat:tomcat	Maven	>=11.0.0-M1, <11.0.25 \|\| >=10.1.0-M1, <10.1.58 \|\| >=9.0.0.M1, <9.0.121 \|\| >=8.5.0, <=8.5.100 \|\| >=7.0.30, <=7.0.109	11.0.25, 10.1.58, 9.0.121
org.apache.tomcat.embed:tomcat-embed-core	Maven	>=11.0.0-M1, <11.0.25 \|\| >=10.1.0-M1, <10.1.58 \|\| >=9.0.0.M1, <9.0.121 \|\| >=8.5.0, <=8.5.100 \|\| >=7.0.30, <=7.0.109	11.0.25, 10.1.58, 9.0.121
org.apache.tomcat:tomcat-catalina	Maven	>=11.0.0-M1, <11.0.25 \|\| >=10.1.0-M1, <10.1.58 \|\| >=9.0.0.M1, <9.0.121 \|\| >=8.5.0, <=8.5.100 \|\| >=7.0.30, <=7.0.109	11.0.25, 10.1.58, 9.0.121

Identifiers

GHSA-9xv2-5v5q-p794 · BIT-tomcat-2026-65905 · CVE-2026-65905

Weakness (CWE)

CWE-294

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache Tomcat (org.apache.tomcat:tomcat, tomcat-embed-core and tomcat-catalina) versions 11.0.0-M1 through 11.0.24, 10.1.0-M1 through 10.1.57, 9.0.0.M1 through 9.0.120, and older unsupported versions are affected. A client using DIGEST authentication can, under specific nonce count conditions, replay one captured request and bypass authentication. Upgrade to 11.0.25, 10.1.58, or 9.0.121.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS 0.0076, the 55th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:16 UTC First seen by agentprime
31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.