Unknown severity · Source severity not reportedCVE-2026-79650

Apache CXF: OIDC RP Open RedirectCVE-2026-79650

Answer in brief

CVE-2026-79650 records a Unknown severity vulnerability in Apache CXF: OIDC RP Open Redirect. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidc (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 9, 2026Updated Oct 9, 2026Source checked Oct 9, 2026First seen by HOL Oct 9, 2026Material review Oct 9, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidc (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidcgeneric	>=4.2.0 <4.2.4 \|\| >=4.0.0 <4.1.9 \|\| >=0 <3.6.13	4.2.4, 4.1.9, 3.6.13

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidc.
Review the reported fix. Update Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidc to 4.2.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 9, 2026

Sources and claim methodology

Upstream source description

Apache CXF’s OIDC relying-party component could redirect users to an attacker-controlled URL after successful authentication. The issue occurs because attacker-controlled state parameters are preserved and later used as redirect targets without validating that the final decoded URI belongs to the RP’s origin. Both directly encoded and double-encoded external URLs can trigger the issue, depending on which validation path is used. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

Quoted source text, attributed separately from HOL analysis.