Medium severity5.3NVD Advisory· Published Jul 9, 2026· Updated Jul 13, 2026
CVE-2026-59828
CVE-2026-59828
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.
Affected products
4<2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5+ 2 more
- (no CPE)range: <2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*range: >=2026.1.0,<2026.1.5
- cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*
Patches
Vulnerability mechanics
References
9- github.com/discourse/discourse/commit/1f26c1163ce87a2abbd1d01780ab1b5fb16e75f6nvdPatch
- github.com/discourse/discourse/commit/8b773332b0f937dfcd894ed56d56fc5a81578d9dnvdPatch
- github.com/discourse/discourse/commit/8d36da1b68c906592abde3f2e94d505cdf097435nvdPatch
- github.com/discourse/discourse/commit/d58988d46bb1019bfa8b8330ae81a1a134e08511nvdPatch
- github.com/discourse/discourse/security/advisories/GHSA-q456-4f8q-42vxnvdVendor Advisory
- github.com/discourse/discourse/releases/tag/v2026.1.5nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.4.2nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.5.1nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.6.0nvdRelease Notes
News mentions
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