Is there a patch available for CVE-2026-34947?

Yes, a patch is available for CVE-2026-34947. Update the affected software to the latest version immediately.

Discourse CVE-2026-34947

Q: What is the CVSS score of CVE-2026-34947?

CVE-2026-34947 has a CVSS 4.0 base score of 2.7 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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%.

EUVD-2026-18882 LOW

Information Exposure (CWE-200)

2026-04-03 GitHub_M

Information Disclosure Discourse

2.7

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

2.7 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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

2026.1.3,2026.2.2,2026.3.0

EUVD ID Assigned

Apr 03, 2026 - 22:15 euvd

EUVD-2026-18882

Analysis Generated

Apr 03, 2026 - 22:15 vuln.today

CVE Published

Apr 03, 2026 - 21:27 nvd

LOW 2.7

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, staged user custom fields and username are exposed on public invite pages without email verification. 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 expose staged user custom fields and usernames on public invite pages without requiring email verification. An unauthenticated remote attacker can enumerate user information and custom field data by accessing public invitation links, potentially gathering sensitive user attributes before account activation. …

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Vulnerability AssessmentAI

Risk Assessment	The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N/VC:L) reflects low confidentiality impact with no integrity or availability risk-only sensitive data disclosure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker obtains or guesses a public invite URL (e.g., through enumeration or if shared in a forum thread). The attacker navigates to the invite page and inspects the HTML source or intercepts the JSON response, revealing the staged user's username, email address, and any custom field values attached to the account. …
Remediation	Vendor-released patch: upgrade to Discourse 2026.1.3, 2026.2.2, or 2026.3.0 or later. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-34947 vulnerability details – vuln.today

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