CVE-2026-45788

Description

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.

References

• https://github.com/discourse/discourse/commit/5807c426880eadf248006e851604fc9284327ce5
• https://github.com/discourse/discourse/commit/8b4a959b251a856a9c911fb9f2ac34fbc31a7471
• https://github.com/discourse/discourse/commit/eff53af26367ae0dcb3a426954d233e8c7449f95
• https://github.com/discourse/discourse/commit/fa74e0dec7341a858ab83a1977fa52629bced1aa
• https://github.com/discourse/discourse/releases/tag/v2026.1.5