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I. Basic Information for CVE-2026-29178
Vulnerability Information

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Vulnerability Title
Lemmy: Unauthenticated SSRF via file_type query parameter injection in image endpoint
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Lemmy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lemmy是Lemmy开源的一款用于构建社交新闻聚合器和网络论坛的自由软件。 Lemmy 0.19.16之前版本存在安全漏洞,该漏洞源于/api/v4/image/{filename}端点存在参数注入,可能导致服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
LemmyNetlemmy < 0.19.16 -
II. Public POCs for CVE-2026-29178
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III. Intelligence Information for CVE-2026-29178
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