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VulnerabilityPublished

CVE-2026-117691: CWE-347

Source GCVE Database

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Authoritative record:CVE-2026-117691· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical.

Data as of 5 Nov 2026, 16:05 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.19.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Build of Keycloakkeycloak-servicesAffected–Fixed in–
Red Hat Build of Keycloakrhbk/keycloak-rhel9Affected–Fixed in–
Red Hat Single Sign-On 7keycloak-servicesAffected–Fixed in–

AI-suggested

Currently, no mitigation is available or meets Red Hat's criteria for widespread deployment and stability. Users should monitor Red Hat advisories for updates. Until a fix is released, affected systems remain vulnerable to full account takeover via crafted SAML messages.

Description

A critical vulnerability exists in the SAML HTTP-Redirect binding implementation of Keycloak due to inconsistent processing of percent-encoded parameter names during signature verification. This flaw allows an attacker to bypass signature checks by using crafted, unsigned SAML messages, resulting in full account takeover of federated users.

References

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