CVE-2026-16442

Medium

Elevated severity or exploit probability.

CVSS base

7.4 HIGH

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

EPSS — probability of exploitation (30 days)

0.2%

10.5th percentile

CISA KEV

Not listed

Weakness / dates

CWE-346

Published 2026-08-05 · modified 2026-08-10

CVSS breakdown

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

Attack Vector	N	Network
Attack Complexity	H	High
Privileges Required	N	None
User Interaction	N	None
Scope	U	Unchanged
Confidentiality	H	High
Integrity	H	High
Availability	N	None

Timeline

2026-08-05 — Published (NVD)
2026-08-10 — Last modified (NVD)

Description

A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.

Affected

redhat

References

Official: NVD · CVE.org