CVE-2026-105119
OpenAM before 16.1.3 PKCE Enforcement Bypass via OAuth 2.0 Hybrid Flows
- State
- Published
- Severity
- 7.6 High
- Published
- Oct 3, 2026
- Updated
- Oct 6, 2026
- Reserved
- Oct 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-285 Improper Authorization
Affected Products
| Product | Versions |
|---|---|
OpenAMOpenIdentityPlatform |
|
References
- GitHub Security Advisory (GHSA-5p2f-7vcr-6vfh)vendor-advisory
- VulnCheck Advisory: OpenAM before 16.1.3 PKCE Enforcement Bypass via OAuth 2.0 Hybrid Flowsthird-party-advisory
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