CVE-2026-54452
safeurl: Missing IPv6 CIDR Ranges in Blocklist
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.
INFO
Published Date :
Sept. 14, 2026, 4:14 p.m.
Last Modified :
Sept. 14, 2026, 4:14 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-54452
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update safeurl to version 0.2.4.
- Ensure IPv6 is enabled only when necessary.
- Review network configurations for omitted IPv6 ranges.
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CVE-2026-54452 vulnerability anywhere in the article.