CVE-2026-82454
Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-347 |
| Vendor | omnivore-app |
| Product | omnivore |
| Published | Aug 29, 2026 |
Stay Ahead of the Next One
Get instant alerts for omnivore-app omnivore
Be the first to know when new critical vulnerabilities affecting omnivore-app omnivore are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
omnivore-app / omnivore
0 < abf53d650875
References
github.com: https://github.com/omnivore-app/omnivore/pull/4652 github.com: https://github.com/omnivore-app/omnivore/commit/abf53d6508755d3d22a994e28e370a9193ea977a github.com: https://github.com/omnivore-app/omnivore vulncheck.com: https://www.vulncheck.com/advisories/omnivore-before-android-0.227.0-authentication-bypass-via-apple-sign-in
Credits
🔍 Yu Sun