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CVSS 9.8 · CRITICAL

CVE-2026-43512

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

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Analysis

Apache Tomcat versions 8.5 through 11.0 are vulnerable to a critical authentication bypass in the digest authentication implementation. Attackers could potentially bypass security constraints to access protected resources; users should upgrade to versions 11.0.22, 10.1.55, or 9.0.118 immediately.

Severity

Score: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH
Weakness (CWE): CWE-592

EPSS

Probability of exploitation (next 30 days): 0.0004 (0.0%)
Percentile: 12.0%
EPSS: 2026-05-14

Technical description

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Published: 5/12/2026, 4:16:17 PM
Last modified: 5/14/2026, 8:17:05 PM

References

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