Answer in brief
CVE-2026-120971 records a Medium severity (CVSS 5.3) vulnerability in Org.jboss.resteasy/resteasy-core: resteasy: information disclosure through default exception mapper responses. The current sources do not mark it as known exploited. The current feed maps Red Hat/candlepin (generic), Red Hat/resteasy-core (generic), Red Hat/rhbk/keycloak-rhel9-operator (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/candlepin (generic), Red Hat/resteasy-core (generic), Red Hat/rhbk/keycloak-rhel9-operator (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/candlepingeneric | * | Not reported |
| Red Hat/resteasy-coregeneric | * | Not reported |
| Red Hat/rhbk/keycloak-rhel9-operatorgeneric | * | Not reported |
Published upstream
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.