Is there a patch available for EUVD-2026-17557?

Yes, a patch is available for EUVD-2026-17557. Update the affected software to the latest version immediately.

Discourse EUVD-2026-17557

Q: What is the CVSS score of EUVD-2026-17557?

EUVD-2026-17557 has a CVSS 4.0 base score of 6.3 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/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-2026-32619 MEDIUM

Improper Authorization (CWE-285)

2026-03-31 GitHub_M

Authentication Bypass Discourse

6.3

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.3 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/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:P/PR:N/UI:N/VC:N/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

None

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-2026-17557

Analysis Generated

Mar 31, 2026 - 18:16 vuln.today

CVE Published

Mar 31, 2026 - 17:40 nvd

MEDIUM 6.3

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, users who lost access to a topic (e.g., removed from a private category group) could still interact with polls in that topic, including voting and toggling poll status. No content was exposed, but users could modify poll state in topics they should no longer have access to. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

AnalysisAI

Discourse versions 2026.1.0 through 2026.1.2, 2026.2.0 through 2026.2.1, and 2026.3.0-beta retain unauthorized poll interaction capabilities for users who have lost access to private topics, allowing them to vote on and toggle poll status despite removal from category group membership. While no topic content is exposed, the vulnerability permits state modification in topics to which access should have been revoked, violating the intended access control model. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.3 with CVSS:4.0 vector indicates network-accessible, low-complexity attack with no privilege requirement but low integrity impact and attack time of P (persistent). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An authenticated Discourse user with an active session accesses a private topic while a member of a category group. The group membership is subsequently revoked by an administrator. …
Remediation	Upgrade Discourse to version 2026.1.3 (for 2026.1.x instances), 2026.2.2 (for 2026.2.x instances), or 2026.3.0 or later (for 2026.3.x instances). … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-17557 vulnerability details – vuln.today

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