CVE-2026-27936

MEDIUM

Discourse discloses restricted post-action counts to non-privileged users

Title source: cna

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a restriction bypass allows restricted post action counts to be disclosed to non-privileged users through a carefully crafted request. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

References (1)

[X_Refsource_Confirm] https://github.com/discourse/discourse/security/advisories/GHSA-v9r3-p863-6f25

Scores

CVSS v4 6.9

EPSS 0.0002

EPSS Percentile 4.5%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (3)

discourse/discourse = 2026.3.0-latest

discourse/discourse >= 2026.1.0-latest, < 2026.1.2

discourse/discourse >= 2026.2.0-latest, < 2026.2.1

Published Mar 19, 2026

Tracked Since Mar 20, 2026