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CVE-2026-43515EXPLOITEDPATCHED
apache · tomcat

Apache Tomcat: Security constraints not correctly applied

Description

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 Products

VendorProductVersions
apachetomcat11.0.0-M1, 10.1.0-M1, 9.0.0.M1, 8.5.0, 7.0.0

References

  • https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb(vendor-advisory)

Related News (3 articles)

Tier B
CERT-FR1d ago
Multiples vulnérabilités dans Apache Tomcat (13 mai 2026)
→ No new info (linked only)
Tier C
VulDB1d ago
CVE-2026-43515 | Apache Tomcat up to 11.0.21 improper authorization
→ No new info (linked only)
Tier C
oss-security1d ago
CVE-2026-43515: Apache Tomcat: Security constraints not correctly applied
→ No new info (linked only)
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
11.0.22
CWECWE-285
PublishedMay 12, 2026
Last enriched1d agov3
Trending Score52
Source articles3
Independent3
Info Completeness8/14
Missing: cvss, epss, kev, exploit, iocs, mitre_attack

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CRITICALCVE-2026-41293EXP
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HIGHCVE-2026-29129EXP
Apache Tomcat: TLS cipher order is not preserved
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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
May 12, 2026
Actively Exploited
May 12, 2026
Patch Available
May 12, 2026
Discovered by ZDM
May 12, 2026
Updated: severity, patchAvailable
May 12, 2026
Updated: severity, activelyExploited
May 12, 2026

Version History

v3
Last enriched 1d ago
v3Tier C1d ago

Updated severity to CRITICAL, marked as actively exploited, and noted that no exploit is available.

severityactivelyExploited
via VulDB
v2Tier C1d ago

Updated severity from NONE to MEDIUM and corrected patch available version to 11.0.22.

severitypatchAvailable
via oss-security
v11d ago

Initial creation