Auth bypass in Openidentityplatform Openam
CVE-2026-105119
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.
Published .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-5p2f-7vcr-6vfh (vendor-advisory)
- www.vulncheck.com/advisories/openam-before-16.1.3-pkce-enforcement-bypass-via-o… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105119?
- CVE-2026-105119 is a medium-severity vulnerability in Openidentityplatform Openam, classified under Improper Authorization. CVSS score: 6.8/10. Published 2026-10-03.
- How severe is CVE-2026-105119?
- Medium severity. CVSS v3 base score is 6.8 out of 10.