CVE-2026-86735: Snipeitapp Snipe-It

Medium severity, CVSS 5.0. EPSS: 0.3% chance of exploitation in the next 30 days.

snipe-it versions before 8.7.0 contain a server-side request forgery vulnerability in the ExternalUrl validation rule that fails to detect IPv6 transition addresses encoding private IPv4 targets. Attackers with super-admin privileges can configure webhook URLs using NAT64, 6to4, or Teredo transition addresses to bypass SSRF guards and access internal services or cloud metadata endpoints.

Affected products

• Snipeitapp Snipe-It: before 8.7.0 (fixed in 8.7.0)

Published 2026-09-08. Last modified 2026-09-09.