Bug 2476519 (CVE-2026-43515)

Summary:	CVE-2026-43515 tomcat-coyote: tomcat: Improper Authorization allows security bypass
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aakkiang, anujha, aschwart, asoldano, aszczucz, bbaranow, bmaxwell, boliveir, bstansbe, cfu, csutherl, dhanak, dlofthou, drichtar, drosa, dsoumis, edewata, gkimetto, gmalinko, ibek, istudens, ivassile, iweiss, janstey, jclere, jmagne, jrokos, jwon, mfargett, mharmsen, mnovotny, mosmerov, mposolda, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, plodge, pmackay, prisingh, rhel-process-autobot, rmartinc, rmaucher, rstancel, rstepani, sausingh, sdawley, skhandel, smaestri, snegrini, ssilvert, sthorger, szappis, taherrin, thjenkin, vchlup, vdosoudi, vmuzikar, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	In Apache Tomcat, when multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. A remote attacker could exploit this to bypass intended security restrictions for information or actions within the application.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2489311, 2489312, 2489313
Bug Blocks:

Description OSIDB Bzimport 2026-05-12 16:02:08 UTC

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.