CVE-2026-82454 Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in
Attackers can bypass Apple sign-in authentication in the Omnivore API to impersonate any user by forging JWTs using a known public key.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82454?
CVE-2026-82454 is a critical authentication bypass vulnerability in omnivore-app omnivore, published on 29 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-347
Which versions are affected by CVE-2026-82454?
How do I fix CVE-2026-82454?
No fix has been published for CVE-2026-82454 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-82454 being exploited?
There is no known exploitation of CVE-2026-82454 in the wild and no public exploit code.
Sources
Also known as GHSA-8fpq-5wcx-76h3.