Server-side Request Forgery (SSRF) Affecting lemmy_api_common package, versions <0.19.18-beta.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Apr 2026
- disclosed24 Apr 2026
- creditUnknown
Introduced: 24 Apr 2026
NewCVE-2026-42180 (opens in a new tab)How to fix?
Upgrade lemmy_api_common to version 0.19.18-beta.1 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) in the Webmention dispatch process. An attacker can access internal network resources and potentially interact with internal services by submitting a crafted url field during post creation. This is only exploitable if the attacker has a valid low-privileged account and can post to a public community.