CVE-2026-82454 | BDVDB-2026-366273 Detail

Description#

The Omnivore API (packages/api) before the fix in commit abf53d6 contains an authentication bypass in Apple sign-in token verification. The decodeAppleToken function extracted the 'alg' field from the attacker-supplied JWT header and passed it as the sole allowed algorithm to jwt.verify(). Using jsonwebtoken v8 (which does not validate key/algorithm compatibility), an attacker can set alg=HS256 and sign a forged token using Apple's publicly available RSA public key as the HMAC secret, bypassing signature verification and impersonating any Apple-linked account.

Impact#

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References#

Exploit#

History#

1. Version 12026-08-29Record published in the CVE List.
2. Version 22026-09-24Most recent update recorded in the CVE List.