Information Disclosure Vulnerability in RESTEasy by Red Hat
CVE-2026-120971

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Apache Camel 4 For Quarkus 3
Red Hat Build Of Apicurio Registry 3
Red Hat Build Of Debezium 3
Red Hat Build Of Keycloak
Vendor
CVE Published:
3 November 2026

What is CVE-2026-120971?

RESTEasy contains a vulnerability where its default exception mapper returns a localized message within the HTTP 500 response body when an unhandled exception occurs, except for WebApplicationException cases. This behavior can allow a remote unauthenticated client to glean potentially sensitive details included in the localized message if they are able to trigger such an exception. Reports indicate this issue has been observed in RESTEasy version 7.0.2.Final, with further documentation on affected versions forthcoming.

References

https://access.redhat.com/security/cve/CVE-2026-120971
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2565584
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Yu Bao (PayPal Cyber Security Team) for reporting this issue.
.