CVE-2026-120971
Org.jboss.resteasy/resteasy-core: resteasy: information disclosure through default exception mapper responses
No exploitation reported by the sources we read.
- Published2026-11-03
- WeaknessCWE-209
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2026-11-0304:16CVE publishedCNA
Observed activity
isMalicious corpus · updated 2026-11-03 03:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-120971?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-120971?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
Products declared by the CNA
As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.
- Red Hat build of Apache Camel 4 for Quarkus 3other versions: affected
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
- Red Hat build of Apicurio Registry 3other versions: affected
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
- Red Hat build of Debezium 3other versions: affected
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
- Red Hat Build of Keycloakother versions: affected
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
- Red Hat build of Quarkusother versions: affected
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
- Red Hat Fuse 7other versions: unknown
package resteasy-corehttps://access.redhat.com/downloads/content/package-browser/
3 more products in the CVE record.
Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-03
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-120971 yet.
Fix
No fix published by the sources we read yet. NVD record
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
- Metasploit modules
- none listed Metasploit Framework
Sources
Identifiers
- EUVD-2026-115658same flawENISA EUVD · LicenseRef-ENISA-legal-notice
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Published
- 2026-11-03
- Last Modified
- 2026-11-03
- NVD status
- Awaiting Analysis
Frequently asked questions
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What is the CVSS score for CVE-2026-120971?
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