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CVE-2026-82454

Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in

CVSS 4.0 9.3 CRITICALCVSS 3.1 9.1 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-82454

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-82454

Published

omnivore

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "omnivore-app",
                    "product": "omnivore",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:github/omnivore-app/omnivore",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "abf53d650875",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON