CVE-2026-43515
Last modified
CVE-2026-43515 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.84% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 7.0.0, <= 7.0.109 |
| Apache | Tomcat | >= 8.5.0, <= 8.5.100 |
| Apache | Tomcat | >= 9.0.0, < 9.0.118 |
| Apache | Tomcat | >= 10.1.0, < 10.1.55 |
| Apache | Tomcat | >= 11.0.0, < 11.0.22 |
References
- https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bbMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/12/11Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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