fast-uri vulnerable to path traversal via percent-encoded dot segments
Summary
| CVE | CVE-2026-6321 |
|---|---|
| State | PUBLISHED |
| Assigner | openjs |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-04 20:16:20 UTC |
| Updated | 2026-07-02 12:17:43 UTC |
| Description | fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 or later. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.005210000 probability, percentile 0.403670000 (date 2026-07-02)
Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | ce714d77-add3-4f53-aff5-83d477b104bb | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Fast-uri | Fast-uri | affected 3.1.1 semver | Not specified |
| CNA | Fast-uri | Fast-uri | unaffected 3.1.1 semver | Not specified |
| ADP | Red Hat | Cluster Observability Operator 1.5.0 | Not specified | Not specified |
| ADP | Red Hat | HawtIO HawtIO 4.4.0 | Not specified | Not specified |
| ADP | Red Hat | Network Observability NETOBSERV 1.12.0 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.5 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2.6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Developer Hub 1.8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Developer Hub 1.9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Discovery 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI 2.25 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Dev Spaces 3.28 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Openshift Data Foundation 4.16 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Openshift Data Foundation 4.18 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Openshift Data Foundation 4.19 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6.18 | Not specified | Not specified |
| ADP | Red Hat | Confidential Compute Attestation | Not specified | Not specified |
| ADP | Red Hat | OpenShift Pipelines | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Podman Desktop | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Podman Desktop - Tech Preview | Not specified | Not specified |
| ADP | Red Hat | Red Hat Data Grid 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Developer Hub | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| ADP | Red Hat | Cryostat 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Streams For Apache Kafka 2 | Not specified | Not specified |
| ADP | Red Hat | Streams For Apache Kafka 3 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/security/cve/CVE-2026-6321 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| cna.openjsf.org/security-advisories.html | ce714d77-add3-4f53-aff5-83d477b104bb | cna.openjsf.org | Vendor Advisory |
| github.com/fastify/fast-uri/security/advisories/GHSA-q3j6-qgpj-74h6 | ce714d77-add3-4f53-aff5-83d477b104bb | github.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:20338 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24977 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:34342 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24473 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:19238 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:25089 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:21338 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26214 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:25123 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26416 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6321.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24766 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2026:24866 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26234 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26420 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Jvr (en)
CNA: Matteo Collina (en)
CNA: Ulises Gascón (en)
CNA: KaKa (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-05-04T20:01:14.938Z | Reported to Red Hat. |
| ADP | 2026-05-04T19:31:57.253Z | Made public. |
Solutions
ADP: RHSA-2026:34342: Cluster Observability Operator 1.5.0
ADP: RHSA-2026:25089: HawtIO HawtIO 4.4.0
ADP: RHSA-2026:24473: Network Observability (NETOBSERV) 1.12.0
ADP: RHSA-2026:24766: Red Hat Ansible Automation Platform 2.5
ADP: RHSA-2026:24866: Red Hat Ansible Automation Platform 2.6
ADP: RHSA-2026:21338: Red Hat Developer Hub 1.8
ADP: RHSA-2026:26234: Red Hat Developer Hub 1.9
ADP: RHSA-2026:20338: Red Hat Discovery 2
ADP: RHSA-2026:24977: Red Hat OpenShift AI 2.25
ADP: RHSA-2026:25123: Red Hat OpenShift Dev Spaces 3.28
ADP: RHSA-2026:26416: Red Hat Openshift Data Foundation 4.16
ADP: RHSA-2026:26420: Red Hat Openshift Data Foundation 4.18
ADP: RHSA-2026:19238: Red Hat Openshift Data Foundation 4.19
ADP: RHSA-2026:26214: Red Hat Satellite 6.18
There are currently no legacy QID mappings associated with this CVE.