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VulnerabilityPublished

CVE-2026-18967: CWE-294

Source GCVE Database

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Authoritative record:CVE-2026-18967· Medium 6.4

Not known to be exploited · CVSS 6.4 Medium.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score
6.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Aug 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 HatRed Hat Build of KeycloakAffected–Fixed in–
Red HatRed Hat JBoss Enterprise Application Platform Expansion PackAffected–Fixed in–
Red HatRed Hat Single Sign-On 7Affected–Fixed in–

AI-suggested

Currently, no mitigation or patch meeting Red Hat's criteria for ease of use, applicability, or stability is available. Users should monitor vendor advisories for updates. Since exploitation requires capturing a valid assertion and replaying it promptly, limiting exposure to assertion capture and using alternative authentication flows may reduce risk until a fix is released.

Description

A vulnerability in the SAML broker component of Keycloak allows replay of SAML assertions when using the IdP-Initiated flow. The flaw is due to failure to enforce the OneTimeUse condition, enabling attackers who capture a valid assertion to reuse it multiple times. This can lead to session hijacking and unauthorized access as the targeted user.

References

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