Information disclosure in RESTEasy default exception mapper responses
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-209.
Summary
RESTEasy's default exception mapper returns the localized message of unhandled exceptions other than WebApplicationException in the HTTP 500 response body. A remote unauthenticated attacker who can trigger such an exception can obtain information contained in that message (CWE-209). The behavior was reproduced with RESTEasy 7.0.2.Final.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 | — | — | No fix listed | CNA |
| Red Hat | Red Hat build of Apicurio Registry 3 | — | — | No fix listed | CNA |
| Red Hat | Red Hat build of Debezium 3 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Build of Keycloak | — | — | No fix listed | CNA |
| Red Hat | Red Hat build of Quarkus | — | — | No fix listed | CNA |
| Red Hat | Red Hat Fuse 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — | — | No fix listed | CNA |
| Red Hat | Red Hat Satellite 6 | — | — | No fix listed | CNA |
- Red Hat build of Apache Camel 4 for Quarkus 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat build of Apicurio Registry 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat build of Debezium 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat build of Quarkus VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Fuse 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat JBoss Enterprise Application Platform 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat JBoss Enterprise Application Platform Expansion Pack VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Satellite 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:camel_quarkus:3 | 3 | — | Red Hat |
| cpe:/a:redhat:apicurio_registry:3 | 3 | — | Red Hat |
| cpe:/a:redhat:debezium:3 | 3 | — | Red Hat |
| cpe:/a:redhat:build_keycloak: | — | — | Red Hat |
| cpe:/a:redhat:quarkus:3 | 3 | — | Red Hat |
| cpe:/a:redhat:jboss_fuse:7 | 7 | — | Red Hat |
| cpe:/a:redhat:jboss_enterprise_application_platform:8 | 8 | — | Red Hat |
| cpe:/a:redhat:jbosseapxp | — | — | Red Hat |
| cpe:/a:redhat:satellite:6 | 6 | — | Red Hat |
- cpe:/a:redhat:camel_quarkus:3 Versions 3 — ·Red Hat
- cpe:/a:redhat:apicurio_registry:3 Versions 3 — ·Red Hat
- cpe:/a:redhat:debezium:3 Versions 3 — ·Red Hat
- cpe:/a:redhat:build_keycloak: Versions — — ·Red Hat
- cpe:/a:redhat:quarkus:3 Versions 3 — ·Red Hat
- cpe:/a:redhat:jboss_fuse:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:jboss_enterprise_application_platform:8 Versions 8 — ·Red Hat
- cpe:/a:redhat:jbosseapxp Versions — — ·Red Hat
- cpe:/a:redhat:satellite:6 Versions 6 — ·Red Hat
Remediation
The sources list no fixed version for 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, Red Hat build of Quarkus, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack and Red Hat Satellite 6. Red Hat's plan is no fix planned for Red Hat Fuse 7 and none available for the others.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Build of Keycloak | Affected | No fix yet: Fix deferred |
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Enterprise Application Platform 8 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Affected | No fix yet: Fix deferred |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apache Camel 4 for Quarkus 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Debezium 3 | Affected | No fix yet: Fix deferred |
| Red Hat build of Quarkus | Affected | No fix yet: Fix deferred |
Timeline
- 2026-11-03 Threatist record created from CVE-2026-120971
- 2026-11-03 Affected versions changed · CNA
- 2026-11-03 Affected versions changed · Red Hat
- 2026-11-03 CVSS score added · Red Hat
- 2026-11-03 Alias added: GHSA-q934-x6mh-3877
- 2026-11-03 CISA SSVC decision points changed
References
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Sources
- CVE-2026-120971 · CVE Program
- CVE-2026-120971 · NVD
- FIRST EPSS
- GHSA-q934-x6mh-3877 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-120971 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences