CVE-2026-57817— Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow
Quick assessment
Affected
Apache Software Foundation Apache CXF
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
OpenID Connect Core 1.0 规范要求，在采用 Hybrid（混合）流程时，Relying Party（RP，依赖方）必须验证 参数。如果与不合规或配置错误的身份提供方（IdP）集成的 Apache CXF RP 接收到的授权响应中省略了 参数，则 RP 将易受授权代码替换/注入攻击。建议用户升级至版本 4.2.3、4.1.8 或 3.6.12，这些版本已修复此问题。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache CXF | 4.2.0< 4.2.3 |
affected |
4.0.0< 4.1.8 |
affected | ||
< 3.6.12 |
affected |
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I. Basic Information for CVE-2026-57817
Vulnerability Information
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Vulnerability Title
Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache CXF | 4.2.0 ~ 4.2.3 | - |
|
II. Public POCs for CVE-2026-57817
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-57817 (1)
Same Patch Batch · Apache Software Foundation · 2026-08-06 · 18 CVEs total
| CVE-2026-64640 | 5.3 MEDIUM | Apache Polaris: register endpoint reads attacker-controlled storage location before allowe |
| CVE-2026-65583 | Apache CXF: Self-issued ID token claims validation skipped | |
| CVE-2026-54225 | Apache CXF: Denial of Service attack via large attachments | |
| CVE-2026-57819 | Apache CXF: No default restriction on the amount of form parameters per message | |
| CVE-2026-64958 | Apache CXF: Denial of service via message header attachments | |
| CVE-2026-66909 | Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage | |
| CVE-2026-65432 | Apache CXF: XXE via WSDL/XSD import parsing | |
| CVE-2026-68481 | Apache CXF: Revocation bypass in DefaultEncryptingOAuthDataProvider | |
| CVE-2026-68079 | Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay | |
| CVE-2025-49506 | Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack | |
| CVE-2026-63687 | Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters | |
| CVE-2026-61466 | Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation | |
| CVE-2026-57818 | Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider | |
| CVE-2026-34502 | Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client | |
| CVE-2026-34501 | Apache Portable Runtime Utility: Heap buffer overflow in APR redis client | |
| CVE-2026-34191 | Apache Portable Runtime Utility: SQL Injection in apr_dbd_oracle | |
| CVE-2026-32327 | Apache Portable Runtime Utility: apr-util XML stack recursion crash |
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