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Fencer Vulns
medium 5.3

CVE-2026-120971 json

Org.jboss.resteasy/resteasy-core: resteasy: information disclosure through default exception mapper responses

published 2026-11-03 6 d ago modified 2026-11-03 5 d ago also EUVD-2026-115658

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-120971 updated cvss 5.3

org.jboss.resteasy/resteasy-core: RESTEasy: Information disclosure through default exception mapper responses

  • Red Hat build of Apache Camel 4 for Quarkus 3 resteasy-core 6.2.19.Final-redhat-00003 Red Hat build of Apicurio Registry 3 resteasy-core 6.2.19.Final-redhat-00003 Red Hat build of Debezium 3 resteasy-core 6.2.19.Final-redhat-00003 Red Hat Build of Keycloak resteasy-core 6.2.19.Final-redhat-00003 Red Hat build of Quarkus resteasy-core 6.2.19.Final-redhat-00003
    affected: no fix available “Fix deferred”
  • Red Hat Fuse 7 resteasy-core 6.2.19.Final-redhat-00003
    affected: no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform 8 resteasy-core 6.2.19.Final-redhat-00003 Red Hat JBoss Enterprise Application Platform Expansion Pack resteasy-core 6.2.19.Final-redhat-00003 Red Hat Satellite 6 candlepin, candlepin-selinux
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5 d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Red Hat Red Hat build of Apache Camel 4 for Quarkus 3
  • Red Hat Red Hat build of Apicurio Registry 3
  • Red Hat Red Hat build of Debezium 3
  • Red Hat Red Hat Build of Keycloak
  • Red Hat Red Hat build of Quarkus
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 8
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat Satellite 6

Classification

Weakness
  • CWE-209 Generation of Error Message Containing Sensitive Information

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.