What is CVE-2026-31805?

CVE-2026-31805 is a medium-severity vulnerability in Discourse, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-03-20.

How severe is CVE-2026-31805?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Discourse

CVE-2026-31805

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass in the poll plugin allowed authenticated users to vote on, remove votes from, or toggle the open/closed s…

Vulnerability class: Broken Access Control

EPSS: 0.001 (29.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Discourse — versions >= 2026.1.0-latest, < 2026.1.2, >= 2026.2.0-latest, < 2026.2.1, = 2026.3.0-latest.1

Weakness classification (CWE)

References

https://github.com/discourse/discourse/security/advisories/GHSA-fgxm-prjv-g823 (x_refsource_CONFIRM)
https://github.com/discourse/discourse/commit/1a6b3cdd8939053f485a60a6ea004a40878392c4 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-31805?: CVE-2026-31805 is a medium-severity vulnerability in Discourse, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-03-20.
How severe is CVE-2026-31805?: Medium severity. CVSS v3 base score is 5.3 out of 10.