UpHeron
All vulnerabilities

Servers and applications

CVE-2026-59828

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.

Severity
Medium 5.3
Published
9 Jul 2026
Last changed
13 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
2026.1.5, 2026.4.2, 2026.5.1
Sources
NVD

Affected software

SoftwareAffected versions
DiscourseServers and applications · cpe:a:discourse:discourse
  • From 2026.1.0 before 2026.1.5
  • From 2026.4.0 before 2026.4.2
  • From 2026.5.0 before 2026.5.1
  • Version 2026.6.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-59828
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-59828