CVE-2026-18967: CWE-294
Source GCVE Database
Not known to be exploited · CVSS 6.4 Medium.
Data as of 5 Nov 2026, 00:01 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 6 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat Build of Keycloak | Affected– | Fixed in– |
| Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack | Affected– | Fixed in– |
| Red HatRed Hat Single Sign-On 7 | Affected– | 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.