PT-2026-5623 · Red Hat · Keycloak

Patrick Smith · Published 2026-02-02 · Updated 2026-02-02 · CVE-2026-1518

Positive Technologies · (AI Summary)

CVSS v3.1

2.7

2.7

Low

Base vector

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

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

Description A flaw exists in Keycloak’s CIBA feature related to inadequate validation of client-configured backchannel notification endpoints. This could allow for blind server-side requests to internal services. The issue involves the potential for unauthorized access to internal services through improperly validated endpoints.

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

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-1518

GHSA-FWHW-CHW4-GH37

Affected Products

Keycloak

References · 7

• https://osv.dev/vulnerability/GHSA-fwhw-chw4-gh37 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1518 · Security Note
• https://github.com/keycloak/keycloak · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2433727 · Note
• https://t.me/cveNotify/150543 · Telegram Post
• https://access.redhat.com/security/cve/CVE-2026-1518 · Note
• https://twitter.com/VulmonFeeds/status/2018246214064414792 · Twitter Post