CVE-2026-41293: critical vulnerability in Apache Tomcat
Apache Tomcat: HTTP/2 request headers not validated
Published · Updated
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.8epss 1.7%
from disclosure to weapon86 days
Published on NVDMay 12
1st PoC+86d
exploitation probability
1.7%top 23% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache Tomcatpublic PoCs found — 1
githubgithub.com/xiaoqiMikko/tomcat-check★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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