Is there a patch available for EUVD-2026-17553?

Yes, a patch is available for EUVD-2026-17553. Update the affected software to the latest version immediately.

Discourse EUVD-2026-17553

Q: What is the CVSS score of EUVD-2026-17553?

EUVD-2026-17553 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:L/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-2026-32615 MEDIUM

Improper Authorization (CWE-285)

2026-03-31 GitHub_M

Authentication Bypass 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:L/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:L/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

2026.2.2,2026.3.0,2026.1.3

EUVD ID Assigned

Mar 31, 2026 - 18:16 euvd

EUVD-2026-17553

Analysis Generated

Mar 31, 2026 - 18:16 vuln.today

CVE Published

Mar 31, 2026 - 17:40 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, category group moderators could perform privileged actions on topics inside private categories they did not have read access to. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

AnalysisAI

Category group moderators in Discourse versions 2026.1.0-2026.1.2, 2026.2.0-2026.2.1, and 2026.3.0-pre can perform privileged actions (such as topic moderation) on content within private categories to which they lack read access, bypassing intended access controls. This authenticated privilege escalation affects self-hosted and managed Discourse instances and has been resolved in versions 2026.1.3, 2026.2.2, and 2026.3.0+. …

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Vulnerability AssessmentAI

Risk Assessment	The CVSS 5.3 score reflects low-to-medium severity: the attack requires authentication (PR:L), network access (AV:N), and no user interaction, yielding limited confidentiality and integrity impact (VC:L, VI:L) with no availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An authenticated category group moderator assigned to moderate a private category (e.g., 'Staff Only') attempts to access a topic in that category via the Discourse web UI or API. Normally, the topic would be invisible because the moderator lacks read permission. …
Remediation	Upgrade immediately to patched versions: 2026.1.3, 2026.2.2, or 2026.3.0 and later depending on the currently deployed major version track. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-17553 vulnerability details – vuln.today

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