CVE-2026-72728
Published:August 10, 2026
Updated:August 31, 2026
Discourse is an open-source discussion platform. Prior to 2026.1.7, an authenticated user could submit specially formed URLs that bypassed the Onebox allowlist and embedded malicious content in a site. This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1.
Affected Packages
https://github.com/discourse/discourse.git (GITHUB):
Affected version(s) =v2026.7.0 <v2026.7.1Fix Suggestion:
Update to version v2026.7.1https://github.com/discourse/discourse.git (GITHUB):
Affected version(s) >=v2026.6.0 <v2026.6.2Fix Suggestion:
Update to version v2026.6.2https://github.com/discourse/discourse.git (GITHUB):
Affected version(s) >=v2026.1.0 <v2026.1.7Fix Suggestion:
Update to version v2026.1.7Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Improper Input Validation
EPSS
Base Score:
0.18