CVE-2026-15573 — CVE & Security Advisory Radar

🎯 CVE-2026-15573 HIGH 8.1 🔥 EPSS 29% 🇪🇺 EUVD

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CVE-2026-15573 | A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should

A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.

Klassifikation & Betroffenheit:

Red Hat Red Hat build of Keycloak 26.4 patch: 26.4.14-1Red Hat build of Keycloak 26.6 patch: 26.6.5-1Red Hat build of Keycloak 26.6 patch: 26.6-11Red Hat build of Keycloak 26.4 patch: 26.4-22redhat build_of_keycloak *redhat data_grid 8.0redhat single_sign-on 7.0

Improper Control of Generation of Code ('Code Injection') 🎯 Medium

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

🛡️ Empfohlene Mitigation: Refactor your program so that you do not have to dynamically generate code.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-35 · Leverage Executable Code in Non-Executab… (Very High) CAPEC-77 · Manipulating User-Controlled Variables (Very High) CAPEC-242 · Code Injection (High)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1027.006 · Obfuscated Files or Information: H… T1027.009 · Obfuscated Files or Information: E… T1564.009 · Hide Artifacts: Resource Forking

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-11807 9.6 CVE-2025-12543 9.6 CVE-2026-16242 9.4 CVE-2026-1709 9.4 CVE-2023-46846 9.3

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 08/2026

Heute 16.09.

CVSS-Vektor-Analyse: 8.1

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Keine

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Veröffentlicht:05.08.2026

Aktualisiert:31.08.2026 10:16

Assigner (CNA):redhat

EUVD-ID:EUVD-2026-53381

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-29	2026-09-15
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

8.1 HIGH

🇪🇺 EUVD

EPSS

29%

CVE-2026-15573 🌐 Netzwerk (Remote) 🔑 Geringe Nutzerrechte nötig

Red Hat

CVE-2026-15573 | A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

05.08.2026

🛡️ Details ➔

Zero-Day & Vulnerability Intelligence Hub