Is there a patch available for EUVD-2026-17571?

Yes, a patch is available for EUVD-2026-17571. Update the affected software to the latest version immediately.

Discourse EUVD-2026-17571

Q: What is the CVSS score of EUVD-2026-17571?

EUVD-2026-17571 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:L/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-2026-33185 MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-03-31 GitHub_M

SSRF 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:L/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:L/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

2026.1.3,2026.2.2,2026.3.0

EUVD ID Assigned

Mar 31, 2026 - 18:16 euvd

EUVD-2026-17571

Analysis Generated

Mar 31, 2026 - 18:16 vuln.today

CVE Published

Mar 31, 2026 - 17:41 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, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

AnalysisAI

Server-side request forgery (SSRF) in Discourse group email settings test endpoint allows authenticated non-staff group owners to initiate outbound connections to arbitrary hosts and ports, enabling internal network reconnaissance. Affects Discourse 2026.1.0-2026.1.2, 2026.2.0-2026.2.1, and 2026.3.0-rc versions. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS v4.0 score of 5.3 reflects moderate risk with low impact severity-confidentiality loss is limited (VC:L) and integrity/availability are unaffected. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An authenticated non-staff group owner logs into a Discourse instance and accesses the group email settings configuration page. They manually craft a request to the email test endpoint specifying internal IP addresses and ports (e.g., 127.0.0.1:5432 for a PostgreSQL database or 192.168.1.100:22 for SSH) instead of legitimate mail server addresses. …
Remediation	Upgrade Discourse to version 2026.1.3, 2026.2.2, or 2026.3.0 (or later) depending on your current release track. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-17571 vulnerability details – vuln.today

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