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CVE-2026-57818— Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider

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.

JCacheCodeDataProvider 中存在竞争条件漏洞，允许攻击者通过并发请求多次使用单个授权码，从而导致签发多个不同的有效访问令牌。建议用户升级至修复该问题的版本，包括 4.2.3、4.1.8 或 3.6.12。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
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-2026-57818

Vulnerability Information
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Vulnerability Title
Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider
Source: CVE Program / CVE List V5
Vulnerability Description
A race condition in JCacheCodeDataProvider allows an attacker to redeem a single authorization code multiple times via concurrent requests, resulting in the issuance of multiple distinct, valid access tokens. Users are recommended to upgrade to versions 4.2.3, 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
检查时间与使用时间(TOCTOU)的竞争条件
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-2026-57818

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III. Intelligence Information for CVE-2026-57818

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Mailing List Discussions for CVE-2026-57818 (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-2026-68079 Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay
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-2026-57817 Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow
CVE-2026-65432 Apache CXF: XXE via WSDL/XSD import parsing
CVE-2026-68481 Apache CXF: Revocation bypass in DefaultEncryptingOAuthDataProvider
CVE-2025-49506 Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack
CVE-2026-65583 Apache CXF: Self-issued ID token claims validation skipped
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-2026-34502 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

IV. Related Vulnerabilities

Same product: Apache CXF
Same vendor: Apache Software Foundation
Same weakness: CWE-367

V. Comments for CVE-2026-57818

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