CVE-2026-72722 — CVE & Security Advisory Radar

🎯 CVE-2026-72722 MEDIUM 4.3 🔥 EPSS 32% 🧪 PoC 🇪🇺 EUVD

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CVE-2026-72722 | Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even though the targets are not visible to that user. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Klassifikation & Betroffenheit:

discourse discourse < 2026.1.6discourse 2026.7.0-latest, < 2026.7.0discourse 2026.5.0-latest, < 2026.5.2discourse 2026.6.0-latest, < 2026.6.1

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-2025-46813 5.8 CVE-2023-28111 5.7 CVE-2022-46177 5.7 CVE-2022-23549 5.7 CVE-2022-31096 5.7

🩹 Patch verfügbar (OSV):

🩹 94190ccb5176eb4ab1f2b509fcecc3fc682dadae (Commit) 🩹 3a87be49d621faddf5cea3f6a090adc9b7cbb7e8 (Commit)

📰 Eigene Berichterstattung: ➔ CVE-2026-72722 | Discourse up to 2026.1.5/2026.5.1/2026.6.0 privileges managemen

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 08/2026

Heute 13.09.

CVSS-Vektor-Analyse: 4.3

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Gering

I · Integrität Keine

A · Verfügbarkeit Keine

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

Veröffentlicht:10.08.2026

Aktualisiert:08.09.2026 20:54

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2026-55659

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	2026-09-12
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

4.3 MEDIUM

🇪🇺 EUVD

EPSS

32%

CVE-2026-72722 🌐 Netzwerk (Remote) 🔑 Geringe Nutzerrechte nötig

🧪 discourse

CVE-2026-72722 | Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even

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

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

10.08.2026

🛡️ Details ➔

Zero-Day & Vulnerability Intelligence Hub