CVE-2026-1529HIGH 8.1EPSS p35.2%

CVE-2026-1529CVE-2026-1529

Description

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS0.44% probability of exploitation · percentile 35.2% · 2026-06-19T12:03:05Z
Published2026-02-09
Last modified2026-04-15

Underlying weaknesses· 1

CWE-347

References

  1. https://access.redhat.com/errata/RHSA-2026:2363
  2. https://access.redhat.com/errata/RHSA-2026:2364
  3. https://access.redhat.com/errata/RHSA-2026:2365
  4. https://access.redhat.com/errata/RHSA-2026:2366
  5. https://access.redhat.com/security/cve/CVE-2026-1529
  6. https://bugzilla.redhat.com/show_bug.cgi?id=2433783

1

TypeTargetConfidenceTier
WeaknessImproper Verification of Cryptographic Signaturecwe-3470%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.