Bundesamt für Sicherheit in der Informationstechnik Open Source · Keycloak: Mehrere Schwachstellen
Affects Bundesamt für Sicherheit in der Informationstechnik Open SourceSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 4.2 Medium · fixed in 26.6.3 : update Bundesamt für Sicherheit in der Informationstechnik Open Source when convenient.
Data as of 9 Nov 2026, 14:49 UTC
- Patch
- Available – fixed in 26.6.3
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 27 May 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 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat build of Keycloak 26.4 | Affected– | Fixed in– |
| Red HatRed Hat build of Keycloak 26.4 | Affected– | Fixed in– |
| Red HatRed Hat build of Keycloak 26.4.14 | Affected– | Fixed in– |
| Red HatRed Hat build of Keycloak 26.6 | Affected– | Fixed in– |
| Red HatRed Hat build of Keycloak 26.6 | Affected– | Fixed in– |
| Red HatRed Hat build of Keycloak 26.6.5 | Affected– | Fixed in– |
AI-suggested
A fixed version of Keycloak is available in 26.6.3. Users should upgrade to Keycloak 26.6.3 or later to address these vulnerabilities. Before updating, back up existing installations including applications, configurations, and databases. No additional mitigations are specified beyond applying the official update.
Description
Keycloak, an open-source identity and access management solution, has multiple security vulnerabilities including a moderate severity HTTP parameter pollution flaw that can allow attackers to manipulate authentication when clients accept broad redirect URIs. Additional vulnerabilities fixed in version 26.6.3 address issues such as unauthorized token acquisition, privilege escalation, denial of service, information disclosure, and improper access control. These flaws could lead to unauthorized access, information leaks, and denial of service under certain conditions.
References
- wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1708.json (opens in a new tab)
- wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1708 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2481845 (opens in a new tab)
- access.redhat.com/security/cve/cve-2026-9689 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2481877 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482458 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482459 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482460 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482461 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482462 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482464 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482470 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482473 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482467 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2482465 (opens in a new tab)
- keycloak.org/2026/06/keycloak-2663-released (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25098 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25097 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30084 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30049 (opens in a new tab)