PT-2026-26540 · Discourse · Discourse

Jomaxr · Published 2026-03-20 · Updated 2026-05-13 · CVE-2026-30889

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/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. A moderator could exploit insufficient authorization checks to access metadata of posts they should not have permission to view. The issue involves inadequate restrictions on access to post metadata.

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-2026-30889

CVE-2026-30889

GHSA-5QM9-R98F-G4MQ

Affected Products

Discourse

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30889.json · Exploit
• https://github.com/discourse/discourse/security/advisories/GHSA-5qm9-r98f-g4mq · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-30889 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-30889 · Security Note
• https://osv.dev/vulnerability/CVE-2026-30889 · Vendor Advisory
• https://twitter.com/lyrie_ai/status/2054621750382506446 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2034903002784350230 · Twitter Post
• https://twitter.com/CVEnew/status/2034841427952509371 · Twitter Post