# CVE-2026-6322: fast-uri vulnerable to host confusion via percent-encoded authority delimiters

> CVE-2026-6322: fast-uri vulnerable to host confusion via percent-encoded authority delimiters. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-6322
Last updated: 2026-09-10T13:20:29Z

- Published: 2026-05-05 10:29 UTC · Updated: 2026-09-10 13:20 UTC · Assigner: openjs
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS: 0.51%, 43th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-436

## 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.

## Affected vendors and products

- fast-uri: fast-uri
- Red Hat: Cluster Observability Operator 1.5.0
- Red Hat: Confidential Compute Attestation
- Red Hat: Cryostat 4
- Red Hat: Network Observability Operator
- Red Hat: OpenShift Lightspeed
- Red Hat: OpenShift Pipelines
- Red Hat: OpenShift Serverless
- Red Hat: Red Hat Advanced Cluster Management for Kubernetes 2.16
- Red Hat: Red Hat AMQ Broker 7
- Red Hat: Red Hat Ansible Automation Platform 2
- Red Hat: Red Hat Ansible Automation Platform 2.5 for RHEL 8
- Red Hat: Red Hat Ansible Automation Platform 2.5 for RHEL 9
- Red Hat: Red Hat Ansible Automation Platform 2.6
- Red Hat: Red Hat Ansible Automation Platform 2.6 for RHEL 9
- Red Hat: Red Hat Ansible Automation Platform 2.7
- Red Hat: Red Hat build of Apache Camel - HawtIO 4
- Red Hat: Red Hat Build of Podman Desktop
- Red Hat: Red Hat Build of Podman Desktop - Tech Preview
- Red Hat: Red Hat Data Grid 8.6.2
- Red Hat: Red Hat Enterprise Linux 10
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3
- Red Hat: Red Hat Hardened Images
- Red Hat: Red Hat OpenShift AI (RHOAI)
- Red Hat: Red Hat OpenShift Container Platform 4
- Red Hat: Red Hat Openshift Data Foundation 4
- Red Hat: Red Hat OpenShift Dev Spaces
- Red Hat: Red Hat OpenShift Virtualization 4
- Red Hat: Red Hat Satellite 6
- Red Hat: Self-service automation portal 2

## Tracked companies

- [Bitbucket](https://rewindex.com/company/bitbucket.md)
- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-6322)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-6322)
- [https://cna.openjsf.org/security-advisories.html](https://cna.openjsf.org/security-advisories.html)
- [https://github.com/fastify/fast-uri/security/advisories/GHSA-v39h-62p7-jpjc](https://github.com/fastify/fast-uri/security/advisories/GHSA-v39h-62p7-jpjc)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-6322 · Markdown: https://rewindex.com/cve/CVE-2026-6322.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-6322 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:00:09.907Z