LemmyNet lemmy
Published Atomicorp research notes for CVEs affecting LemmyNet lemmy where WAF protections were observed during testing or engineering review.
These notes are not intended to represent the full set of vulnerabilities mitigated by Atomicorp products and should not be interpreted as a coverage matrix, certification list, or census of protected CVEs.
Atomicorp WAF protections are primarily designed around attack techniques and exploit behaviors rather than individual vulnerability identifiers. A published research note documents a positive research finding related to that CVE. If a CVE is absent from these notes, no conclusion should be drawn about protection status.
| CVE | Vulnerability | CVSS | Severity | Rules Observed |
|---|---|---|---|---|
| CVE-2026-42181 | Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image | 6.5 (v3.1) | Medium | 337109 , 337110 , 340165 , 344360 , 347009 , 390722 , 398021 , 398022 |
| CVE-2026-42180 | Lemmy: SSRF in /api/v3/post via Webmention dispatch | 6.3 (v3.1) | Medium | 337109 , 337110 , 344360 , 398021 , 398022 |