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CVE-2026-105119— OpenAM before 16.1.3 PKCE Enforcement Bypass via OAuth 2.0 Hybrid Flows

Quick assessment

Affected
OpenIdentityPlatform OpenAM
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.

在 OpenAM 16.1.3 之前的版本中，OAuth2 提供方的 PKCE（代码验证器）强制校验机制仅适用于 response_type 恰好为 “code” 的授权请求。因此，通过 OpenID Connect 混合流程（即 response_type 为 “code token”、“code id_token” 或 “code token id_token”）颁发的授权码未绑定相应的 code_challenge。攻击者若拦截此类授权码，可使用任意非空的 code_verifier 为其兑换公共客户端的访问

CVSS 6.8 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenIdentityPlatform OpenAM < 16.1.3 affected
16.1.3 unaffected
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I. Basic Information for CVE-2026-105119

Vulnerability Information
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Vulnerability Title
OpenAM before 16.1.3 PKCE Enforcement Bypass via OAuth 2.0 Hybrid Flows
Source: CVE Program / CVE List V5
Vulnerability Description
OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to authorization requests whose response_type is exactly code, so codes issued through OpenID Connect hybrid flows (code token, code id_token, code token id_token) carry no bound challenge. An attacker who intercepts such a code can redeem it for a public client's tokens with any non-empty code_verifier.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenIdentityPlatform OpenAM 0 ~ 16.1.3 -

II. Public POCs for CVE-2026-105119

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III. Intelligence Information for CVE-2026-105119

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Vendor Advisories for CVE-2026-105119 (2)

Same Patch Batch · OpenIdentityPlatform · 2026-10-03 · 9 CVEs total

CVE-2026-105115 8.6 HIGH OpenAM before 16.1.3 Unauthenticated Arbitrary Class Instantiation via JAX-RPC Interface
CVE-2026-105117 6.1 MEDIUM OpenAM before 16.1.3 Email Content Injection via Users REST Self-Service Actions
CVE-2026-105114 6.1 MEDIUM OpenAM before 16.1.3 Reflected XSS via OAuth2 Authorization Error Page
CVE-2026-105116 6.1 MEDIUM OpenAM before 16.1.3 Latent XSS in SAML Load-Balancer Cookie Bounce Page
CVE-2026-105122 5.4 MEDIUM OpenAM before 16.1.3 SSRF via OpenID Connect Client jwks_uri
CVE-2026-105120 4.9 MEDIUM OpenAM before 16.1.3 Cross-Realm Session Disclosure via Sessions REST Endpoint
CVE-2026-105121 4.9 MEDIUM OpenAM before 16.1.3 Improper Authorization in Delegated Session-Destroy Realm Scoping
CVE-2026-105118 4.7 MEDIUM OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession

IV. Related Vulnerabilities

Same product: OpenAM
Same vendor: OpenIdentityPlatform
Same weakness: CWE-285

V. Comments for CVE-2026-105119

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