PT-2026-36864

Summary Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP ranges, the extracted og:image URL is not subject to the same restriction...

CVE-2026-29178 Lemmy: Unauthenticated SSRF via file_type query parameter injection in image endpoint

Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypubfederation, a framework for ActivityPub federation in Rust. Prior to version 0.19.16, the GET /api/v4/image/filename endpoint is vulnerable to unauthenticated SSRF...

CVE-2026-29178 Lemmy: Unauthenticated SSRF via file_type query parameter injection in image endpoint

Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypubfederation, a framework for ActivityPub federation in Rust. Prior to version 0.19.16, the GET /api/v4/image/filename endpoint is vulnerable to unauthenticated SSRF...

CVE-2026-29178: Server-Side Request Forgery (SSRF)

Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypubfederation, a framework for ActivityPub federation in Rust. Prior to version 0.19.16, the GET /api/v4/image/filename endpoint is vulnerable to unauthenticated SSRF...

PT-2025-15905

Summary An improper uploaded media ownership check can result in inadvertent deletion of media when a user is banned with content removal or purged. This can lead to deletion of media that was not uploaded by the banned/purged user. This also applies to purged communities, in which case all media...