VULNERABILITY INTELLIGENCE
CVE-2026-29178
EPSS probability0.29%
CISA KEVNot currently listed
Published2026-03-06
Last modified2026-06-17
Description
Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypub_federation, 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 through parameter injection in the file_type query parameter. An attacker can inject arbitrary query parameters into the internal request to pict-rs, including the proxy parameter which causes pict-rs to fetch arbitrary URLs. This issue has been patched in version 0.19.16.
Weakness classification
- security-advisories@github.com: CWE-918