CVE-2026-54452

medium

Description

safeurl is a server-side request forgery protection library. Prior to 0.2.4, the privateNetworks list in ip.go omits the IPv6 ranges 64:ff9b:1::/48, 5f00::/16, 3fff::/20, and 100:0:0:1::/64. When an application enables IPv6 with EnableIPv6(true), an attacker-controlled destination in one of these ranges is not recognized as non-public and can pass the SSRF destination check, potentially allowing access to resources hosted within the omitted ranges. IPv6 is disabled by default, and configurations that retain EnableIPv6(false) are not exposed to this bypass. This issue is fixed in version 0.2.4.

References

https://github.com/doyensec/safeurl/security/advisories/GHSA-xgch-x3mx-cm3c

https://github.com/doyensec/safeurl/releases/tag/v0.2.4

https://github.com/doyensec/safeurl/pull/12

https://github.com/doyensec/safeurl/commit/d8f1021ea535b276f92999f0ec865da40e467016

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-77630

Details

Source: Mitre, NVD

Published: 2026-09-14

Updated: 2026-09-30

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.1

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

Severity: Critical

CVSS v4

Base Score: 6.3

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Severity: Medium

EPSS

EPSS: 0.0039