CVE-2026-120971
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.
Key facts
- CVSS score
- 5.3 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
- CWE-209
- EPSS score
- 0.3% (28th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-115658)
- Published
- November 3, 2026
- NVD last modified
- November 3, 2026
- Status
- Awaiting Analysis
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-115658 in the EU Vulnerability Database. Last updated in EUVD on November 3, 2026.
View on the EU Vulnerability DatabaseReferences
Last updated November 4, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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