fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still return values that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line. Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-ASCII hosts before policy checks.
References
Configurations
Configuration 1 (hide)
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History
22 Jul 2026, 12:17
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21 Jul 2026, 12:17
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17 Jul 2026, 13:17
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16 Jul 2026, 12:17
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15 Jul 2026, 02:18
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14 Jul 2026, 12:16
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02 Jul 2026, 19:55
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Openjsf
Openjsf fast-uri |
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| CPE | cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:* | |
| References | () https://cna.openjsf.org/security-advisories.html - Vendor Advisory | |
| References | () https://github.com/fastify/fast-uri/security/advisories/GHSA-4c8g-83qw-93j6 - Patch, Vendor Advisory | |
| References | () https://access.redhat.com/security/cve/CVE-2026-13676 - Third Party Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2494197 - Third Party Advisory | |
| References | () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13676.json - Third Party Advisory |
30 Jun 2026, 03:17
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| CWE | CWE-551 | |
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29 Jun 2026, 14:16
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| New CVE |
Information
Published : 2026-06-29 14:16
Updated : 2026-07-22 12:17
NVD link : CVE-2026-13676
Mitre link : CVE-2026-13676
CVE.ORG link : CVE-2026-13676
JSON object : View
Products Affected
openjsf
- fast-uri
