CVE-2026-4629: A flaw was found in Keycloak

This month

MEDIUM 6.5WATCHLISTMITIGATE

CVE-2026-4629 is a medium-severity flaw (CVSS 6.5) affecting build of keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions and inject the `realm-admin` role into generated tokens, resulting in privilege escalation and full administrative access to the realm.

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-266
Published	2026-06-30
Last modified	2026-10-22

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30Published CVE record published
2026-10-22 21:17 UTCUpdated Record last modified

redhat build of keycloak MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy build-of-keycloak || rpm -q build-of-keycloak || build-of-keycloak --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source

sudo dnf upgrade --advisory=FEDORA-2026-0602a84203

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-4629?

build of keycloak: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-4629 being exploited?

CVE-2026-4629 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-4629 affect?

CVE-2026-4629 affects build of keycloak. Severity is medium (CVSS 6.5). A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions a

How urgent is CVE-2026-4629?

Priority 43/100. Public exploit reference; On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2026-4633 LOW 3.7 MITIGATE A flaw was found in Keycloak
CVE-2026-4628 MEDIUM 4.3 MITIGATE A flaw was found in Keycloak
CVE-2026-37980 MEDIUM 6.9 MITIGATE A flaw was found in Keycloak, specifically in the organization selection login page

References

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