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VulnerabilityPublished

CVE-2026-107602: Infinite Loop

Source GCVE Database

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Authoritative record:CVE-2026-107602· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 5 Nov 2026, 19:47 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 effective mitigation or patch is available that meets Red Hat's criteria for widespread deployment and stability. Administrators should monitor Red Hat advisories for updates. Until a fix is released, mitigating this vulnerability may require manual intervention such as limiting exposure of SAML 1.1 endpoints or applying custom request filtering, though these are not officially recommended by Red Hat.

Description

A vulnerability in Keycloak's SAML 1.1 XML parsing logic causes an infinite loop when unexpected elements appear in a security token's key information section. This flaw allows an unauthenticated remote attacker to trigger 100% CPU usage, resulting in a denial of service that requires a server restart to recover.

References

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