CVE Catalog

CVE-2026-55834

MediumCVSS 4.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

19th percentile - higher than 19% of all known CVEs

Summary

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to services. From 2.6.0 until 2.9.0, the client-side path in authorize does not block all dangerous URL schemes and does not invoke the backend callback allow-list validation, allowing an unauthenticated attacker to 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 Assessment

An attacker can exploit this for phishing or OIDC state manipulation, potentially leading to data theft or account takeover.

Recommendation

Update Pocket ID to version 2.9.0 or later.

Related vulnerabilities

Original NVD description (English source)

Pocket 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS