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CVE-2026-82454— Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in

Quick assessment

Affected
omnivore-app omnivore
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Omnivore API（packages/api）在提交 abf53d6 修复之前，其 Apple 登录令牌验证中存在身份验证绕过漏洞。 函数会从攻击者提供的 JWT 头部中提取 字段，并将其作为唯一允许的算法传递给 。由于使用的 jsonwebtoken 版本为 v8（该版本不验证密钥与算法的兼容性），攻击者可以将 设置为 ，并使用 Apple 公开可用的 RSA 公钥作为 HMAC 密钥来签名伪造令牌，从而绕过签名验证，并冒充任意与 Apple 关联的账户。

CVSS 9.1 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
omnivore-app omnivore < abf53d650875 affected
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I. Basic Information for CVE-2026-82454

Vulnerability Information
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Vulnerability Title
Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
omnivore-app omnivore 0 ~ abf53d650875 -

II. Public POCs for CVE-2026-82454

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82454

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Patches & Fixes for CVE-2026-82454 (2)

Vendor Advisories for CVE-2026-82454 (1)

Other References for CVE-2026-82454 (1)

IV. Related Vulnerabilities

Same product: omnivore
Same vendor: omnivore-app
Same weakness: CWE-347

V. Comments for CVE-2026-82454

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