PT-2026-26708 · Discourse · Discourse

Davidtaylorhq · Published 2026-03-20 · Updated 2026-03-27 · CVE-2026-33424

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

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. An attacker can grant access to a private message topic through invites even after they lose access to that private message.

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-2026-33424

CVE-2026-33424

GHSA-HGCP-P7HQ-CWXW

Affected Products

Discourse

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33424.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-hgcp-p7hq-cwxw · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-33424 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-33424 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33424 · Security Note
• https://twitter.com/CVEnew/status/2035262111316603228 · Twitter Post