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CVE

CVE-2026-1529

Keycloak affected by improper invitation token validation
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CVE

CVE-2026-1529

Keycloak affected by improper invitation token validation

A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
C
H
U
8.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-1529, https://github.com/keycloak/keycloak/issues/46145, https://github.com/keycloak/keycloak/pull/46155, https://github.com/keycloak/keycloak/commit/82cd7941d1dd28fa14a67a6e6b912301f1a5e1a1, https://github.com/keycloak/keycloak/commit/8fc9a98026106a326f4faa98d4c9a48341ace2d7, https://github.com/keycloak/keycloak/commit/b2519756487b519f95c07aa8b10afe003e492119, https://access.redhat.com/errata/RHSA-2026:2363, https://access.redhat.com/errata/RHSA-2026:2364, https://access.redhat.com/errata/RHSA-2026:2365, https://access.redhat.com/errata/RHSA-2026:2366, https://access.redhat.com/security/cve/CVE-2026-1529, https://bugzilla.redhat.com/show_bug.cgi?id=2433783, https://github.com/keycloak/keycloak

Severity

8.1

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.1
EPSS Probability
0.00011%
EPSS Percentile
0.01295%
Introduced Version
26.5.0,26.3.0,26.0.0,25.0.3,25.0.0,25.0.4
Fix Available
26.5.3,26.4.9,26.2.13

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