MinorCritical vulnerability

CVE-2026-123542 (CVSS 7.6)

NVD · officialPublished Nov 8, 2026Risk 23/100EPSS 0.3%

OpenAM before 16.1.4 fails to enforce PKCE in the OAuth 2.0 device authorization flow, never validating the code verifier when device codes are exchanged for tokens. Attackers who obtain an approved device code from client logs or shared device storage can redeem it for access and ID tokens to impersonate the user.

Technical details

CVSS

7.6

AV:NetworkAC:HighPR:NoneUI:Passive

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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