CVE-2026-55420

HIGH7.5

Discourse: Remote code execution via pdf uploads

Published Jul 9, 2026

Modified 3 months ago

Details

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

References

WEB

https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914

WEB

https://github.com/discourse/discourse/releases/tag/v2026.1.5

WEB

https://github.com/discourse/discourse/releases/tag/v2026.4.2

WEB

https://github.com/discourse/discourse/releases/tag/v2026.5.1

WEB

https://github.com/discourse/discourse/releases/tag/v2026.6.0

WEB