CVE-2026-41293
Apache Tomcat: HTTP/2 request headers not validated
9.8
CRITICAL
CVSS 3.1
EPSS 1.3%
Description
Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0 through 11.0.21, from 10.1.0 through 10.1.54, from 9.0.0 through 9.0.117, from 10.0.0 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.
How to fix CVE-2026-41293
To remediate CVE-2026-41293, upgrade the affected package to a fixed version below.
- —upgrade to 10.1.55 or later
- —upgrade to 10.1.55-1~deb12u1 or later
- —upgrade to 11.0.22-1~deb13u1 or later
- —upgrade to 9.0.118-0+deb11u1 or later
- —upgrade to 9.0.118 or later
- —upgrade to 9.0.118 or later
- —upgrade to 9.0.118 or later
Is CVE-2026-41293 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (7)
- >= 10.0.0, < 10.1.55, >= 11.0.0, < 11.0.22, >= 9.0.0, < 9.0.118
- from 0, < 10.1.55-1~deb12u1
- from 0, < 11.0.22-1~deb13u1
- from 0, < 9.0.118-0+deb11u1
- from 0, < 9.0.118
- from 0, < 9.0.118
- from 0, < 9.0.118
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |