CVE-2026-43515

Apache Tomcat: Security constraints not correctly applied

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension 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 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Affected

Apache Software Foundation · Apache Tomcat

CVSS v3.1 CNA

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

EPSS

1.22% chance of exploitation in the next 30 days, 68th percentile

Published

2026-05-12

Updated

2026-06-04

Proof-of-concept exploits (1)

• covepseng/cve-2026-43515-poc1★ · 2026-06-19

Security advisories

• https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb
• http://www.openwall.com/lists/oss-security/2026/05/12/11
• advisories/GHSA-5m62-pw8w-7w9f

References

• CVE Record
• NVD entry

Related

• CVE-2026-102268
• CVE-2026-43512
• CVE-2026-49352
• CVE-2026-9558