CVE-2026-45788 PUBLISHED

Discourse: Secure uploads exposed by hotlinked image copying

Assigner: GitHub_M
Reserved: 13.05.2026 Published: 09.07.2026 Updated: 10.07.2026

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, secure uploads could be exposed by pull_hotlinked_images when an attacker knew the secured upload URL and the secure_uploads site setting was enabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	discourse
Product	discourse
Versions	Version >= 2026.1.0-latest, < 2026.1.5 is affected Version >= 2026.4.0-latest, < 2026.4.2 is affected Version >= 2026.5.0-latest, < 2026.5.1 is affected

References

Problem Types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE