PT-2026-48986 · Discourse · Discourse

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-45775

NVD

CVSS v3.1

6.8

Medium

Base vector

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

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a path traversal vulnerability in Discourse backup handling could allow an authenticated administrator on one site in a multisite deployment to access backup files belonging to another site when backups are stored locally. In affected configurations, an admin on Site A could potentially retrieve sensitive backup data from Site B (same host, multisite) by crafting a backup download request with a traversal payload. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-45775

Affected Products

Discourse

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-45775 · Security Note
• https://github.com/discourse/discourse/security/advisories/GHSA-5j6v-4x6g-9pg5 · Note