PT-2026-57004 · Discourse · Discourse

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-59828

Mitre

CVSS v3.1

5.3

Medium

Base vector

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

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, post revisions that should be hidden from regular users could be leaked through visible diffs on adjacent revisions serialized by PostRevisionSerializer. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-59828

Affected Products

Discourse

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-59828 · Security Note
• https://github.com/discourse/discourse/releases/tag/v2026.6.0 · Note
• https://github.com/discourse/discourse/security/advisories/GHSA-q456-4f8q-42vx · Note
• https://github.com/discourse/discourse/releases/tag/v2026.5.1 · Note
• https://github.com/discourse/discourse/commit/d58988d46bb1019bfa8b8330ae81a1a134e08511 · Note
• https://github.com/discourse/discourse/commit/1f26c1163ce87a2abbd1d01780ab1b5fb16e75f6 · Note
• https://github.com/discourse/discourse/commit/8d36da1b68c906592abde3f2e94d505cdf097435 · Note
• https://github.com/discourse/discourse/commit/8b773332b0f937dfcd894ed56d56fc5a81578d9d · Note
• https://github.com/discourse/discourse/releases/tag/v2026.1.5 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.4.2 · Note