CVE-2026-7504

highPriorität · verfolgen · 0EPSS 0.005 · 43. PerzentilDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.50% (43rd) EPSS

CVSS 8.1 · high

Is it mine?

15 products

Prüfe deine Angriffsfläche

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · bewertet 2026-10-27

A flaw was found in Keycloak's URL validation logic during redirect operations. By crafting a malicious request, an attacker could bypass validation to redirect users to unauthorized URLs, potentially leading to the exposure of sensitive information within the domain or facilitating further attacks. This vulnerability specifically affects Keycloak clients configured with a wildcard (*) in the "Valid Redirect URIs" field and requires user interaction to be successfully exploited. The issue stems from a discrepancy in how Keycloak and the underlying Java URI implementation handle the user-info component of a URL. If a malicious redirect URL is constructed using multiple @ characters in the user-info section, Java's URI parser fails to extract the user-info, leaving only the raw authority field. Consequently, Keycloak's validation check fails to detect the malformed user-info, falls back to a wildcard comparison, and incorrectly permits the malicious redirect.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

8.1

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.18.1highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secalert@redhat.com USAusnutzbarkeit 2.8 · Auswirkung 5.2

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NsecondaryAusnutzbarkeit 2.8 · Auswirkung 5.2

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · OSV

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-601USCWE-601USCWE-601US

betroffene Produkte (15)

Betroffene Produkte und Versionsbereiche.

Open Source Keycloak <26.6.2alle Versionencert_bundDE
Red Hat Enterprise Linuxalle Versionencert_bundDEcpe:/o:redhat:enterprise_linux:-
Open Source Keycloak< 26.6.2cert_bundDE
Red Hat Red Hat build of Keycloak 26.2< 26.2-21enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.2< 26.2.16-1enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.4< 26.4-17enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.4< 26.4.12-1enisa_euvdEU
Red Hat Inc. Keycloak≤ 26.4.12fstec_bduRU
Red Hat Inc. Keycloak≤ 26.7.0fstec_bduRU
Red Hat Inc. Keycloak≤ 26.6.2fstec_bduRU
Red Hat Inc. Keycloak≤ 26.2.16fstec_bduRU
АО «ИВК» АЛЬТ СП 10alle Versionenfstec_bduRU
redhat build of keycloak26.4 → 26.4.12nvdUScpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*
Bitnami keycloak26.4.0 → 26.4.12osvUSpkg:bitnami/keycloak
Maven org.keycloak:keycloak-services< 26.6.2osvUSpkg:maven/org.keycloak/keycloak-services

Advisories (3)

Hersteller- und Ökosystem-Meldungen dazu.

WID-SEC-W-2026-1612Keycloak: Mehrere SchwachstellenDeutsch2026-05-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um Informationen offenzulegen, Daten zu manipulieren, Sicherheitsvorkehrungen zu umgehen und einen Denial of Service zu verursachen.
GHSA-rp95-xpg9-c2cqKeycloak: Open redirect when using wildcard valid redirect URIs in Keycloak2026-05-19ghsa · osvUS
A flaw was found in Keycloak's URL validation logic during redirect operations. By crafting a malicious request, an attacker could bypass validation to redirect users to unauthorized URLs, potentially leading to the exposure of sensitive information within the domain or facilitating further attacks. This vulnerability specifically affects Keycloak clients configured with a wildcard (*) in the "Valid Redirect URIs" field and requires user interaction to be successfully exploited. The issue stems from a discrepancy in how Keycloak and the underlying Java URI implementation handle the user-info component of a URL. If a malicious redirect URL is constructed using multiple @ characters in the user-info section, Java's URI parser fails to extract the user-info, leaving only the raw authority field. Consequently, Keycloak's validation check fails to detect the malformed user-info, falls back to a wildcard comparison, and incorrectly permits the malicious redirect.
BIT-keycloak-2026-7504Org.keycloak/keycloak-services: open redirect when using wildcard valid redirect uris in keycloak2026-08-25vendor · osvUS
A flaw was found in Keycloak's URL validation logic during redirect operations. By crafting a malicious request, an attacker could bypass validation to redirect users to unauthorized URLs, potentially leading to the exposure of sensitive information within the domain or facilitating further attacks. This vulnerability specifically affects Keycloak clients configured with a wildcard (*) in the "Valid Redirect URIs" field and requires user interaction to be successfully exploited. The issue stems from a discrepancy in how Keycloak and the underlying Java URI implementation handle the user-info component of a URL. If a malicious redirect URL is constructed using multiple @ characters in the user-info section, Java's URI parser fails to extract the user-info, leaving only the raw authority field. Consequently, Keycloak's validation check fails to detect the malformed user-info, falls back to a wildcard comparison, and incorrectly permits the malicious redirect.

auch bekannt als (6)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu osv cert_bund nvd NVD CVE.org MITRE

veröffentlicht 2026-05-19geändert 2026-10-26

Referenzen (15)

Externe Belege — Patches, Meldungen, Analysen.

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