Independent & educational platform Not a government body. No link or affiliation with any government organisation. Made for learning only. Test only systems you own or are authorised to test. Become a Partner or Sponsor → Full disclaimer

CVE-2023-6291

high

A flaw was found in the redirect_uri validation logic in Keycloak.

Vendor / product: Redhat — keycloak

A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

CVSS
7.1
7.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2024-01-26 15:15
Modified: 2026-11-04 21:17
NVD status: Modified
Last synced 5 hours ago
Verified against the source API 2026-11-04 21:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

redhat / keycloak <22.0.7
redhat / single_sign-on all versions, 7.6
redhat / openshift_container_platform 4.11, 4.12
redhat / openshift_container_platform_for_ibm_z 4.9, 4.10
redhat / openshift_container_platform_for_linuxone 4.9, 4.10
redhat / openshift_container_platform_for_power 4.9, 4.10
redhat / migration_toolkit_for_applications 6.0, 7.0

Weakness classification (CWE)

CWE-601

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7854
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7855
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7856
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7857
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7858
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7860
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7861
Vendor advisory: https://access.redhat.com/security/cve/CVE-2023-6291
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2251407
Vendor advisory: https://access.redhat.com/errata/RHSA-2023:7854

References

Data sources

NVD CVE API 2.0 — fetched 2026-11-04 21:37 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

Related CVEs

CVE-2026-9064CVE-2026-73198CVE-2026-73197CVE-2026-6846CVE-2026-6384