EUVD-2026-28819

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy allows an authenticated low-privileged user to create a link post through POST /api/v3/post. When a post is created in a public community, the backend asynchronously sends a Webmention to the attacker-controll...

Lemmy 代码问题漏洞

Lemmy is open-source software developed by Lemmy, used for building social news aggregators and web forums. Versions of Lemmy prior to 0.19.18 had code vulnerabilities. These vulnerabilities stemmed from the lack of mechanisms to reject loops, private links, or link-local targets when creating li...