CVE-2026-41076 — CVE & Security Advisory Radar

🎯 CVE-2026-41076 HIGH 8.1 🔥 EPSS 39% 🧪 PoC 🇪🇺 EUVD

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CVE-2026-41076 | RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.9 and prior in addition to 6.0.0 through 6.0.2 contain an authentication bypass vulnerability in RT installations that use LDAP/AD for user authentication. Under certain LDAP server configurations, an attacker may be able to authenticate as any LDAP-backed RT user without supplying valid credentials. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are

RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.9 and prior in addition to 6.0.0 through 6.0.2 contain an authentication bypass vulnerability in RT installations that use LDAP/AD for user authentication. Under certain LDAP server configurations, an attacker may be able to authenticate as any LDAP-backed RT user without supplying valid credentials. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are unable to upgrade immediately, they can temporarily work around this issue by reviewing their LDAP server's authentication policy to ensure it rejects unauthenticated bind attempts. Upgrading RT remains the recommended fix.

Klassifikation & Betroffenheit:

bestpractical RT < 5.0.10RT 6.0.0, < 6.0.3

Improper Authentication 🎯 High

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

🛡️ Empfohlene Mitigation: Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-22 · Exploiting Trust in Client (High) CAPEC-57 · Utilizing REST's Trust in the System Res… (Very High) CAPEC-114 · Authentication Abuse (Medium) CAPEC-115 · Authentication Bypass (Medium) CAPEC-151 · Identity Spoofing (Medium) CAPEC-194 · Fake the Source of Data (Medium) CAPEC-593 · Session Hijacking (Very High) CAPEC-633 · Token Impersonation (Medium)

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

T1040 · Network Sniffing T1548 · Abuse Elevation Control Mechanism T1185 · Browser Session Hijacking T1550.001 · Use Alternate Authentication Mater… T1563 · Remote Service Session Hijacking T1134 · Access Token Manipulation

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

CVE-2026-44231 9.1 CVE-2026-41075 8.8 CVE-2025-31500 7.2 CVE-2025-31501 7.2 CVE-2025-30087 7.2

🩹 Patch verfügbar (OSV):

🩹 4a144d80a0b73821a6c5283f0c47840ab6930a6c (Commit) 🩹 51f63bbd924b9277ec6d2db49a6d89e8f25da141 (Commit)

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 05/2026

Heute 08.09.

CVSS-Vektor-Analyse: 8.1

AV · Angriffsvektor Netzwerk

AC · Komplexität Hoch

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:22.05.2026

Aktualisiert:28.05.2026 03:55

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2026-31504

CWE-287: Improper Authentication ✓ Offizieller Patch / Advisory verfügbar

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

Tier	2026-08-29	2026-09-06
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

8.1 HIGH

🇪🇺 EUVD

EPSS

39%

CVE-2026-41076 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

🧪 bestpractical

CVE-2026-41076 | RT is an open source, enterprise-grade issue and ticket tracking system. Versions 5.0.9 and prior in addition to 6.0.0 through 6.0.2 contain an authentication bypass vulnerability in RT installations that use LDAP/AD for user authentication. Under certain LDAP server configurations, an attacker may be able to authenticate as any LDAP-backed RT user without supplying valid credentials. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are

CWE-287: Improper Authentication ✓ Offizieller Patch / Advisory verfügbar

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

22.05.2026

🛡️ Details ➔

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