CVE-2026-42180

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...

CVE-2026-42181

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

CVE-2026-42180

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...

CVE-2026-42181

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

CVE-2026-42180

Lemmy prior to version 0.19.18 is affected by a server-side request forgery: an authenticated low-privilege user can create a link post via POST /api/v3/post, and when posted to public communities Lemmy dispatches a Webmention to the target. The code path only validates the URL’s syntax/scheme (h...

CVE-2026-42180

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...

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...

CVE-2026-42180 Lemmy: SSRF in /api/v3/post via Webmention dispatch

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...

CVE-2026-42180 Lemmy: SSRF in /api/v3/post via Webmention dispatch

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...

CVE-2026-42181

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

CVE-2026-42181 Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

CVE-2026-42181 Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

CVE-2026-42181

Lemmy prior to 0.19.18 is vulnerable to SSRF through post link metadata: the system validates the top-level URL against internal ranges, but the og:image URL extracted from the page is not subjected to the same restriction. An authenticated low-privileged user can post a page whose og:image point...

EUVD-2026-28820

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, 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...

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...

Lemmy 代码问题漏洞

Lemmy is open-source software developed by Lemmy for building social news aggregators and web forums. Versions of Lemmy prior to 0.19.18 had code vulnerabilities. These vulnerabilities stemmed from the og:image URL being extracted without being restricted by the internal IP range, which could lea...

lemmy_server (>=0.11.3-rc.5 <=0.16.2-rc.1) potentially affected by unknown CVE via lemmy_api (>=0.11.3-rc.5 <=0.16.2-rc.1)

lemmyapi CARGO version =0.11.3-rc.5, =0.11.3-rc.5, =0.16.2-rc.1 Source cves: unknown CVE Source advisory: OSV:GHSA-QXRW-F6FH-34R7...

GHSA-QXRW-F6FH-34R7 Lemmy resend-verification endpoint exposes registered email addresses to unauthenticated users

Summary The unauthenticated resend-verification endpoint returns different responses for registered and unregistered email addresses. A malicious third party can submit candidate addresses to /api/v4/account/auth/resendverificationemail and distinguish accounts from misses. Details...

lemmy_server (>=0.11.3-rc.5 <=0.16.2-rc.1) potentially affected by unknown CVE via lemmy_api (>=0.11.3-rc.5 <=0.16.2-rc.1)

lemmyapi CARGO version =0.11.3-rc.5, =0.11.3-rc.5, =0.16.2-rc.1 Source cves: unknown CVE Source advisory: OSV:GHSA-JMXC-HHWX-GVV3...

lemmy_api (>=0.11.3-rc.5 <=0.16.2-rc.1), lemmy_api_crud (>=0.11.3-rc.5 <=0.16.2-rc.1) +5 more potentially affected by CVE-2026-42181 via lemmy_api_common (>=0.11.3-rc.5 <=0.16.2-rc.1)

lemmyapicommon CARGO version =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.11.3-rc.5, =0.16.2-rc.1 Source cves: CVE-2026-42181 Source advisory: OSV:GHSA-H6HF-9846-XWRQ...