CVE-2026-86735

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.

Scoring

Severity
MEDIUM
CVSS base score
5.9
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS probability
0.25%
CWE
CWE-918
Published
2026-09-08
Last modified
2026-09-08

Affected products

Weakness type

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