Pocket ID: Client credentials grant allows any OIDC client to obtain tokens for arbitrary audiences

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-62662
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 23:17:56 UTC
Updated2026-11-04 23:17:56 UTC
DescriptionPocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 1.11.0 until 2.10.0, createTokenFromClientCredentials in backend/internal/service/oidc_service.go accepts the client-controlled resource parameter and embeds it directly in the access token aud claim without validating that the audience is registered or that the requesting client may access it. Any authenticated OIDC client can therefore obtain a Pocket ID-signed token naming another client or an arbitrary audience. The /api/oidc/introspect endpoint cannot distinguish the unauthorized token because it treats a token as active when the introspecting client's identifier matches the attacker-selected audience. In deployments where resource servers trust Pocket ID access tokens for service-to-service authorization, this bypasses audience-based access controls and can permit unauthorized data access or actions; deployments that do not use these tokens for resource-server authorization have no immediate exploitable impact. This issue is fixed in version 2.10.0.

Risk And Classification

Primary CVSS: v3.0 7.7 HIGH from [email protected]

CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

Problem Types: CWE-20 | CWE-863 | CWE-20 CWE-20: Improper Input Validation | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary7.7HIGHCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
3.0CNADECLARED7.7HIGHCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pocket-id Pocket-id affected >= 1.11.0, < 2.10.0 Not specified

References

ReferenceSourceLinkTags
github.com/pocket-id/pocket-id/commit/8158452b37304115c97c61c3a56082ce93... [email protected] github.com
github.com/pocket-id/pocket-id/security/advisories/GHSA-q4xm-p75h-h9p3 [email protected] github.com
github.com/pocket-id/pocket-id/releases/tag/v2.10.0 [email protected] github.com
github.com/pocket-id/pocket-id/pull/1520 [email protected] github.com
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