Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.5 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/1f26c1163ce87a2abbd1d01780ab1b5fb1Patch
- https://github.com/discourse/discourse/commit/8b773332b0f937dfcd894ed56d56fc5a81Patch
- https://github.com/discourse/discourse/commit/8d36da1b68c906592abde3f2e94d505cdfPatch
- https://github.com/discourse/discourse/commit/d58988d46bb1019bfa8b8330ae81a1a134Patch
- https://github.com/discourse/discourse/releases/tag/v2026.1.5Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.4.2Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.5.1Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.6.0Release Notes
- https://github.com/discourse/discourse/security/advisories/GHSA-q456-4f8q-42vxVendor Advisory
FAQ
What is CVE-2026-59828?
CVE-2026-59828 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 a...
How severe is CVE-2026-59828?
CVE-2026-59828 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59828?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.