Pocket ID: Open Redirect on the OIDC /authorize page via unvalidated redirect_uri with prompt=none

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55834
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 20:18:30 UTC
Updated2026-09-09 21:09:13 UTC
DescriptionPocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 2.6.0 until 2.9.0, frontend/src/routes/authorize/+page.ts reads the redirect_uri query parameter and frontend/src/routes/authorize/+page.svelte uses the raw callbackURL in redirectWithError when prompt=none cannot complete silent authorization. The client-side path only blocks javascript and data schemes and does not invoke the backend callback allow-list validation, so an unauthenticated attacker who knows a valid client_id can redirect a victim browser to an arbitrary HTTP or HTTPS origin for phishing or OIDC error and state smuggling. This issue is fixed in version 2.9.0.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS: 0.002690000 probability, percentile 0.189320000 (date 2026-09-10)

Problem Types: CWE-601 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pocket-id Pocket-id affected >= 2.6.0, < 2.9.0 Not specified

References

ReferenceSourceLinkTags
github.com/pocket-id/pocket-id/commit/8a7577497131229badb35cb4b3a4227b13... [email protected] github.com
github.com/pocket-id/pocket-id/releases/tag/v2.9.0 [email protected] github.com
github.com/pocket-id/pocket-id/security/advisories/GHSA-2wvm-8mvp-22qv 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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