CVE-2026-37980: A flaw was found in Keycloak, specifically in the organization selection login page

Q: How do I fix CVE-2026-37980?

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

Q: Is CVE-2026-37980 being exploited?

CVE-2026-37980 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-37980 affect?

CVE-2026-37980 affects build of keycloak. Severity is medium (CVSS 6.9). A flaw was found in Keycloak, specifically in the organization selection login page. A remote attacker with `manage-realm` or `manage-organizations` administrative privileges can exploit a Stored Cross-Site Scripting (XSS) vulnerability. Th

Q: How urgent is CVE-2026-37980?

Priority 36/100. On your watchlist

Routine

MEDIUM 6.9WATCHLISTMITIGATE

CVE-2026-37980 is a medium-severity flaw (CVSS 6.9) 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, specifically in the organization selection login page. A remote attacker with `manage-realm` or `manage-organizations` administrative privileges can exploit a Stored Cross-Site Scripting (XSS) vulnerability. This flaw occurs because the `organization.alias` is placed into an inline JavaScript `onclick` handler, allowing a crafted JavaScript payload to execute in a user's browser when they view the login page. Success

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.4% (top 72%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-14
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

2026-04-14Published 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.

Maven · org.keycloak:keycloak-services · NO FIX YET · vulnerable: <= 26.5.5 · source

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

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-2026-37980?

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

Is CVE-2026-37980 being exploited?

CVE-2026-37980 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-2026-37980 affect?

CVE-2026-37980 affects build of keycloak. Severity is medium (CVSS 6.9). A flaw was found in Keycloak, specifically in the organization selection login page. A remote attacker with `manage-realm` or `manage-organizations` administrative privileges can exploit a Stored Cross-Site Scripting (XSS) vulnerability. Th

How urgent is CVE-2026-37980?

Priority 36/100. On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2026-4633 LOW 3.7 MITIGATE A flaw was found in Keycloak
CVE-2026-4629 MEDIUM 6.5 MITIGATE A flaw was found in Keycloak
CVE-2026-4628 MEDIUM 4.3 MITIGATE A flaw was found in Keycloak

References

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