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CVE-2026-3047: A flaw was found in org.keycloak.broker.saml

46
This month
HIGH 8.8WATCHLISTDOWNGRADEMITIGATE

CVE-2026-3047 is a high-severity flaw (CVSS 8.8) affecting build of keycloak, keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.

Why this priority

  • High severity
  • On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score8.8 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.5% (top 57%)
CISA exploited listNo
WeaknessCWE-305
Published2026-03-05
Last modified2026-07-15
Publisher (CNA): Red Hat, Inc. · Vendor: redhat

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Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

redhat build of keycloak DOWNGRADE
Affected: all versions · 26.2 · 26.2.14 · 26.4 · 26.4.10
Fixed in: no fixed release known
Safe to downgrade to: a release before 26.2
1. Check installed version
apt-cache policy build-of-keycloak || rpm -q build-of-keycloak || build-of-keycloak --version
2. No fixed release: DOWNGRADE to a release before 26.2 (Debian / Ubuntu)
apt-cache madison build-of-keycloak sudo apt install build-of-keycloak=<VERSION_BEFORE_26.2> sudo apt-mark hold build-of-keycloak
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list build-of-keycloak sudo dnf downgrade build-of-keycloak-<VERSION_BEFORE_26.2> sudo dnf versionlock add build-of-keycloak
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
redhat 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 keycloak || rpm -q keycloak || keycloak --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
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-2026-3047?

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

Is CVE-2026-3047 being exploited?

CVE-2026-3047 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-2026-3047 affect?

CVE-2026-3047 affects build of keycloak, keycloak. Severity is high (CVSS 8.8). A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establis

How urgent is CVE-2026-3047?

Priority 46/100. High severity; On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

References

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