CVE-2026-28513

Pocket ID: OIDC authorization code validation uses AND instead of OR, allowing cross-client token exchange

State: Published
Severity: 8.5 High
Published: Mar 9, 2026
Updated: Mar 10, 2026
Reserved: Feb 27, 2026

Description

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse. This vulnerability is fixed in 2.4.0.

Scores

CVSS	Score	Vector	Source
3.1	8.5 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N	GitHub_M

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
pocket-idpocket-id	< 2.4.0Affected

References

https://github.com/pocket-id/pocket-id/security/advisories/GHSA-qh6q-598w-w6m2

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