CVE-2026-86735

5.9 mediumEPSS 0.3%

Medium (5.9) in snipeitapp snipe-it. 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.

Severity

CVSS 4.0

5.9 medium

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

CVSS 3.1

5.0 medium

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
CWE: CWE-918
Published: 2026-09-08
Modified: 2026-09-09
Record from: the NVD, synced 2026-10-19

Affected

snipeitapp:snipe-it

References

https://github.com/grokability/snipe-it/security/advisories/GHSA-5j6m-rr83-rpj7
https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-ssrf-via-ipv6-transition-address-bypass

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