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Fencer Intel
medium 5.3

CVE-2026-120971 json

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

published 6d ago modified 6d 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.

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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
6d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 Intel 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.