PT-2025-12782 · Red Hat · Keycloak

Published 2025-03-25 · Updated 2026-05-06 · CVE-2025-2559

Positive Technologies (AI Summary)

CVSS v3.1

4.9

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description A flaw was found in the system when the configuration uses JWT tokens for authentication. The tokens are cached until expiration, and if a client uses JWT tokens with an excessively long expiration time, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2025-2559

GHSA-2935-2WFM-HHPV

Affected Products

Keycloak

References · 14

• https://access.redhat.com/errata/RHSA-2025:4336 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2025:4335 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-2559 · Security Note
• https://osv.dev/vulnerability/GHSA-2935-2wfm-hhpv · Vendor Advisory
• https://github.com/keycloak/keycloak · Note
• https://github.com/keycloak/keycloak/commit/a10c8119d4452b866b90a9019b2cc159919276ca · Note
• https://github.com/keycloak/keycloak/issues/38576 · Note
• https://access.redhat.com/security/cve/CVE-2025-2559 · Note
• https://t.me/cvedetector/21071 · Telegram Post
• https://twitter.com/CVEnew/status/1904454515522175460 · Twitter Post
• https://t.me/cvenotify/116039 · Telegram Post
• https://t.me/cvetracker/19865 · Telegram Post
• https://t.me/cveNotify/162397 · Telegram Post
• https://bugzilla.redhat.com/show_bug.cgi?id=2353868 · Note