CVE•Published 2026-08-06•Modified 2026-08-07•1 article on news•4 live references•NVD data
CVE-2026-57817Apache · Cxf
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
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 omits the `c_hash`, the RP becomes vulnerable to Authorization Code Substitution/Injection attacks. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.
Timeline
Published 2026-08-06
Modified 2026-08-07
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-57817Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Apache Cxf"All exposed Apache Cxf instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Cxf"HTTP body or banner mentions "Cxf" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-57817Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-57817Censys host search filtered to this CVE id.
grep.app
CVE-2026-57817Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-57817GitHub code search for direct mentions.
Google dork
"CVE-2026-57817" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-57817 on GitHub.