Bug 2565584 (CVE-2026-120971)

Summary: CVE-2026-120971 org.jboss.resteasy/resteasy-core: RESTEasy: Information disclosure through default exception mapper responses
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anthomas, ant, anujha, aschwart, asoldano, aszczucz, bbaranow, bmaxwell, boliveir, bstansbe, ccranfor, cescoffi, dlofthou, drichtar, ehelms, ewittman, fmongiar, ggainey, gmalinko, gsmet, istudens, ivassile, iweiss, janstey, jmartisk, jnethert, jpasqual, jpechane, juwatts, kaycoth, lblicha, manderse, mdellweg, mhulan, mosmerov, mposolda, msvehla, nipatil, nmoumoul, nwallace, ogajduse, olubyans, osousa, ozzy, pantinor, pberan, pcreech, pdelbell, pesilva, pjindal, pmackay, rchan, rguimara, rkubis, rmartinc, rstancel, rstepani, sbiarozk, smallamp, ssilvert, sthorger, thjenkin, tmalecek, varjain, vdosoudi, vmuzikar, zhunting
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in RESTEasy's default exception mapper. When an unhandled exception other than a WebApplicationException is not handled by an application exception mapper, RESTEasy returns the exception's localized message in the HTTP 500 response body. A remote unauthenticated attacker who can trigger such an exception may obtain information contained in that message. The behavior was reproduced with RESTEasy 7.0.2.Final.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-03 03:55:20 UTC 
Upstream advisory and remediation references are pending publication by the RESTEasy team. Add the public advisory and fix references when they become available.