Swarms 6.8.1 Server-Side Request Forgery via DNS Rebinding Bypass

Advisories

Swarms 6.8.1 Server-Side Request Forgery via DNS Rebinding Bypass

severity: high
date: 7/30/2026
Affecting: swarms <= 6.8.1
CVE: CVE-2026-67346
CWE: CWE-918 Server-Side Request Forgery (SSRF)
CVSS: 7.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
References: Researcher Disclosure
Pull Request
Patch Commit
Credit: George Chen
Description: Swarms through 6.8.1, fixed in commit 8b0fc9e, contains a server-side request forgery vulnerability in the _is_safe_url function that fails to validate hostnames through DNS resolution, allowing attackers to bypass the blocklist. Attackers can supply user-controlled image or audio URLs that resolve to private, loopback, or metadata addresses to reach internal services and exfiltrate credentials.

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