CVE-2026-43515: critical vulnerability in Apache Tomcat
Apache Tomcat: Security constraints not correctly applied
Published · Updated
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.1epss 1.2%
from disclosure to weapon38 days
Published on NVDMay 12
1st PoC+38d
exploitation probability
1.2%top 32% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
Apache Software Foundation · Apache Tomcatpublic PoCs found — 1
githubgithub.com/covepseng/cve-2026-43515-poc★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Apache Tomcat
In the same product, most dangerous first.
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