PT-2026-26434 · Discourse · Discourse

Davidtaylorhq + 1 · Published 2026-03-19 · Updated 2026-03-27 · CVE-2026-33408

Positive Technologies (AI Summary)

CVSS v3.1

2.7

Low

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A: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, moderators could view the initial 40 characters of post edits within private messages and private categories.

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

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

BIT-DISCOURSE-2026-33408

CVE-2026-33408

GHSA-WF9R-386H-G29C

Affected Products

Discourse

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33408.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-wf9r-386h-g29c · Vendor Advisory
• https://github.com/discourse/discourse/commit/62721429d4402505d21280bcbe5894032447d800 · Patch
• https://github.com/discourse/discourse/commit/3bf3793a708662716c0a4eaf64ae091abe71ab4c · Patch
• https://github.com/discourse/discourse/commit/473288219e93cd17576cf15e4f0b9e388a31d0c1 · Patch
• https://osv.dev/vulnerability/BIT-discourse-2026-33408 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33408 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33408 · Vendor Advisory
• https://twitter.com/CVEnew/status/2034891574279025012 · Twitter Post