CVE-2026-33693 is a Server-Side Request Forgery (SSRF) vulnerability affecting Lemmy versions prior to 0.7.0-beta.9, specifically within the `activitypub-federation-rust` component. An unauthenticated attacker can bypass existing SSRF protections by pointing a remote domain to 0.0.0.0, allowing access to internal localhost services on the target server. Rated as Medium severity (CVSS 6.5), it has a network attack vector and low attack complexity, potentially leading to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| LemmyNet | Lemmy | < 0.7.0-beta.9CNA affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.