PT-2026-26377 · Discourse · Discourse

Davidtaylorhq · Published 2026-03-19 · Updated 2026-03-27 · CVE-2026-27936

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.3.0-latest.1 Discourse versions prior to 2026.2.1 Discourse versions prior to 2026.1.2

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.

Recommendations Update to Discourse version 2026.3.0-latest.1 or later. Update to Discourse version 2026.2.1 or later. Update to Discourse version 2026.1.2 or later.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

BIT-DISCOURSE-2026-27936

CVE-2026-27936

GHSA-V9R3-P863-6F25

Affected Products

Discourse

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27936.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-v9r3-p863-6f25 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-27936 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27936 · Security Note
• https://osv.dev/vulnerability/BIT-discourse-2026-27936 · Vendor Advisory
• https://twitter.com/CVEnew/status/2034891625499951410 · Twitter Post
• https://twitter.com/infoflowcloud/status/2034892966892888330 · Twitter Post
• https://twitter.com/dailycve/status/2036275430710284771 · Twitter Post