Vulnerability Report

CVE-2026-45775

Title: Path Traversal in Discourse Backup Handling

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2026-45775.

CWE Category CWE-22
Published Date Jun 12, 2026
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 6.8 CVSS v3.1
Exploit Probability (EPSS)
0.32%

Vulnerability Summary

CVE-2026-45775: 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.

Impacted Vendors

D
discourse 1

Reference Links

https://github.com/discourse/discourse/security/advisories/GHSA-5j6v-4x6g-9pg5
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-45775 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Affected Stack

No specific products linked.