CVE-2026-29178

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/LemmyNet/lemmy/commit/f47a03f56d1797bceab5f34b6f624c91cecd5871
https://github.com/LemmyNet/lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3
https://github.com/LemmyNet/lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3

Configurations

No configuration.

History

28 Apr 2026, 21:11

Type	Values Removed	Values Added
Summary		(es) Lemmy, un agregador de enlaces y foro para el fediverso, es vulnerable a la falsificación de petición del lado del servidor a través de una dependencia de activitypub_federation, un framework para la federación de ActivityPub en Rust. Antes de la versión 0.19.16, el endpoint GET /API/v4/image/{filename} es vulnerable a SSRF no autenticado a través de la inyección de parámetros en el parámetro de consulta file_type. Un atacante puede inyectar parámetros de consulta arbitrarios en la petición interna a pict-rs, incluyendo el parámetro proxy que hace que pict-rs obtenga URLs arbitrarias. Este problema ha sido parcheado en la versión 0.19.16.

06 Mar 2026, 19:16

Type	Values Removed	Values Added
References	~~() https://github.com/LemmyNet/lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3 -~~	() https://github.com/LemmyNet/lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3 -

06 Mar 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-06 18:16

Updated : 2026-06-17 10:29

NVD link : CVE-2026-29178

Mitre link : CVE-2026-29178

CVE.ORG link : CVE-2026-29178

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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