Bug#1153287: resteasy: CVE-2026-120971

[Moritz Mühlenhoff]

Source: resteasy
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for resteasy.

CVE-2026-120971[0]:
| 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.

https://bugzilla.redhat.com/show_bug.cgi?id=2565584


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-120971
    https://www.cve.org/CVERecord?id=CVE-2026-120971

Please adjust the affected versions in the BTS as needed.