Medium 6.3Published Sep 14, 2026

CVE-2026-54452safeurl: Missing IPv6 CIDR Ranges in Blocklist

Updated under an hour ago (2026-10-19 10:00 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for doyensec safeurl

Exploited in the last 30 days

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.

CVSS: 6.3 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

doyensec safeurl doyensec:safeurl (from the name)	before 0.2.4	CNA record

References

https://github.com/doyensec/safeurl/security/advisories/GHSA-xgch-x3mx-cm3cx-refsource-confirm
https://github.com/doyensec/safeurl/pull/12x-refsource-misc
https://github.com/doyensec/safeurl/commit/d8f1021ea535b276f92999f0ec865da40e467016x-refsource-misc
https://github.com/doyensec/safeurl/releases/tag/v0.2.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.