What is CVE-2026-57817?

CVE-2026-57817 is a high-severity vulnerability in Apache Cxf, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2026-08-06.

How severe is CVE-2026-57817?

High severity. CVSS v3 base score is 8.1 out of 10.

Improper input validation in Apache Cxf

CVE-2026-57817

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash` parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider (IdP) that omi…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Cxf
Apache Software Foundation Cxf — versions 4.2.0, 4.0.0, 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2026-57817?: CVE-2026-57817 is a high-severity vulnerability in Apache Cxf, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2026-08-06.
How severe is CVE-2026-57817?: High severity. CVSS v3 base score is 8.1 out of 10.