CVE-2026-6322
fast-uri vulnerable to host confusion via percent-encoded authority delimiters
HIGH 7.5
At a glance
- Source
- NVD
- EPSS
- EPSS 0.51 % · percentile 44 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- openjs
- NVD status
- Modified
Description
fast-uri normalize() decoded percent-encoded authority delimiters inside the host component and then re-emitted them as raw delimiters during serialization. A host that combined an allowed domain, an encoded at-sign, and a different domain was re-emitted with the at-sign as a raw userinfo separator, changing the URI's authority to the second domain. Applications that normalize untrusted URLs before host allowlist checks, redirect validation, or outbound request routing can be steered to a different authority than the input appeared to specify. Versions <= 3.1.1 are affected. Update to 3.1.2 or later.
Weaknesses (CWE)
References
- https://github.com/fastify/fast-uri/security/advisories/GHSA-v39h-62p7-jpjc
- https://cna.openjsf.org/security-advisories.html
- https://access.redhat.com/security/cve/CVE-2026-6322
- https://bugzilla.redhat.com/show_bug.cgi?id=2466684
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6322.json
- https://access.redhat.com/errata/RHSA-2026:42078
- https://access.redhat.com/errata/RHSA-2026:34160
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:37385
- https://access.redhat.com/errata/RHSA-2026:25273
- https://access.redhat.com/errata/RHSA-2026:34374
- https://access.redhat.com/errata/RHSA-2026:42142
- https://access.redhat.com/errata/RHSA-2026:41951
- https://access.redhat.com/errata/RHSA-2026:36754
- https://access.redhat.com/errata/RHSA-2026:26234
- https://access.redhat.com/errata/RHSA-2026:29197
- https://access.redhat.com/errata/RHSA-2026:61783
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:40945
- https://access.redhat.com/errata/RHSA-2026:40118
- https://access.redhat.com/errata/RHSA-2026:60855
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:57487
- https://access.redhat.com/errata/RHSA-2026:54555
- https://access.redhat.com/errata/RHSA-2026:34766
- https://access.redhat.com/errata/RHSA-2026:37628
- https://access.redhat.com/errata/RHSA-2026:29800
- https://access.redhat.com/errata/RHSA-2026:34770
- https://access.redhat.com/errata/RHSA-2026:37186
- https://access.redhat.com/errata/RHSA-2026:29834
- https://access.redhat.com/errata/RHSA-2026:29796
- https://access.redhat.com/errata/RHSA-2026:29795
- https://access.redhat.com/errata/RHSA-2026:56431
- https://access.redhat.com/errata/RHSA-2026:56366
- https://access.redhat.com/errata/RHSA-2026:57013
- https://access.redhat.com/errata/RHSA-2026:56968
- https://access.redhat.com/errata/RHSA-2026:56928
- https://access.redhat.com/errata/RHSA-2026:33683
- https://access.redhat.com/errata/RHSA-2026:30076
- https://access.redhat.com/errata/RHSA-2026:41066
- https://access.redhat.com/errata/RHSA-2026:54395
- https://access.redhat.com/errata/RHSA-2026:28571
- https://access.redhat.com/errata/RHSA-2026:26225
- https://access.redhat.com/errata/RHSA-2026:25271
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | openjs |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · ce714d77-add3-4f53-aff5-83d477b104bb (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-v39h-62p7-jpjc — fast-uri vulnerable to host confusion via percent-encoded authority delimiters
European references
- ENISA EUVD · EUVD-2026-27248
- GCVE · GCVE-0-2026-6322
CERT-FR advisories
- CERTFR-2026-AVI-1366 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1291 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1233 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0934 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0901 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:*< 3.1.2
Affected products
| Product | Versions |
|---|---|
| fast-uri · fast-uri | affected 0 < 3.1.2 ; unaffected 3.1.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |