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CVE-2026-41293EXPLOITEDPATCHED
apache · tomcat

Apache Tomcat: HTTP/2 request headers not validated

Description

Improper Input Validation vulnerability 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 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

Affected Products

VendorProductVersions
apachetomcat11.0.0-M1, 10.1.0-M1, 9.0.0.M1, 10.0.0-M1, 8.5.0, 8.5.100

References

  • https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r(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-2026-41293 | Apache Tomcat up to 11.0.21 input validation
→ No new info (linked only)
Tier C
oss-security2d ago
CVE-2026-41293: Apache Tomcat: HTTP/2 request headers not validated
→ No new info (linked only)
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r
CWECWE-20
PublishedMay 12, 2026
Last enriched1d agov3
Tags
CVE-2026-41293
Trending Score52
Source articles3
Independent3
Info Completeness9/14
Missing: cvss, epss, kev, iocs, mitre_attack

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Related CVEs (5)

HIGHCVE-2026-29146
Apache Tomcat: EncryptInterceptor vulnerable to padding oracle attack by default
Trending: 54
CRITICALCVE-2026-43515EXP
Apache Tomcat: Security constraints not correctly applied
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NONECVE-2026-41284EXP
Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling
Trending: 52
NONECVE-2026-42498EXP
Apache Tomcat: WebSocket authentication header exposure
Trending: 52
HIGHCVE-2026-29129EXP
Apache Tomcat: TLS cipher order is not preserved
Trending: 44

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
May 12, 2026
Discovered by ZDM
May 12, 2026
Actively Exploited
May 12, 2026
Exploit Available
May 12, 2026
Patch Available
May 12, 2026
Updated: severity, affectedVersions, exploitAvailable, activelyExploited
May 12, 2026
Updated: severity, tags
May 12, 2026

Version History

v3
Last enriched 1d ago
v3Tier C1d ago

Updated severity to CRITICAL and added CVE ID CVE-2026-41293.

severitytags
via VulDB
v2Tier C1d ago

Updated severity to LOW, added affected version 8.5.100, and marked exploit availability and active exploitation as true.

severityaffectedVersionsexploitAvailableactivelyExploited
via oss-security
v11d ago

Initial creation