Is there a patch available for EUVD-2026-17572?

Yes, a patch is available for EUVD-2026-17572. Update the affected software to the latest version immediately.

Discourse EUVD-2026-17572

Q: What is the CVSS score of EUVD-2026-17572?

EUVD-2026-17572 has a CVSS 4.0 base score of 5.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

| CVE-2026-33300 MEDIUM

Information Exposure (CWE-200)

2026-03-31 GitHub_M

Information Disclosure Discourse

5.3

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.3 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

2026.2.2,2026.1.3,2026.3.0

EUVD ID Assigned

Mar 31, 2026 - 18:16 euvd

EUVD-2026-17572

Analysis Generated

Mar 31, 2026 - 18:16 vuln.today

CVE Published

Mar 31, 2026 - 17:42 nvd

MEDIUM 5.3

DescriptionGitHub Advisory

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

AnalysisAI

Discourse 2026.1.0 through 2026.3.0-beta allows authenticated moderators to bypass authorization controls in the Category Chatables Controller, disclosing sensitive information about hidden group names and user counts. The vulnerability affects multiple release branches and has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0. …

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Vulnerability AssessmentAI

Risk Assessment	The CVSS vector (AV:N/AC:L/AT:N/PR:L) confirms network-accessible attack vector with low complexity, requiring only low-level privileges (moderator role). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A Discourse moderator with legitimate access to moderation tools discovers they can query the Category Chatables Controller endpoint to retrieve details about hidden group names and membership counts-information restricted to administrators. The moderator could use this to identify private teams, departments, or groups within their organization, then exploit that knowledge for social engineering, competitive advantage, or targeted harassment of group members. …
Remediation	Vendor-released patch available in versions 2026.1.3, 2026.2.2, and 2026.3.0. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-17572 vulnerability details – vuln.today

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