url-parse before 1.5.0 mishandles certain uses of backslash such as http:\/ and interprets the URI as a relative path.
Priority LOW 28CWE-23Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Partial Red Hat: 1 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
url-parse before 1.5.0 mishandles certain uses of backslash such as http:\/ and interprets the URI as a relative path.
Why it matters now
EPSS 0.01964 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial url-parse (npm): 1.5.0Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | url-parse (npm) | 0.1.0 to before 1.5.0 | 1.5.0 | Patch available | GHSA-9m6j-fcg5-2442 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- url-parse (npm) Vendor— Affected 0.1.0 to before 1.5.0 Fixed in 1.5.0 Patch available GHSA-9m6j-fcg5-2442
Remediation
- Fix · GHSA-9m6j-fcg5-2442 url-parse (npm) Fixed in 1.5.0 Advisory →
Red Hat 1 advisory
- RHSA-2021:3917 Released 2021-10-19 · Red Hat rating ImportantRed Hat Quay v3.6.0 security, bug fix and enhancement update
- Quay v3 quay/quay-rhel8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Decision Manager 7 | Affected | No fix planned: Out of support scope |
| Red Hat Process Automation 7 | Affected | No fix planned: Out of support scope |
| Quay v3 | Fixed | RHSA-2021:3917 |
Not affected: 4 products
- OpenShift Service Mesh 2.0
- Quay v3
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27515
- 2026-10-03 Alias added: GHSA-9m6j-fcg5-2442
References
Patch 3
More unshiftio Url-parse vulnerabilities
- TI-2018-02768 Open redirect in HackerOne url-parse CVSS 3.0CRITICAL 10.0
- TI-2022-00605 Authorization Bypass Through User-Controlled Key in unshiftio/url-parse CVSS 3.1CRITICAL 9.8
- TI-2022-00600 Authorization Bypass Through User-Controlled Key in unshiftio/url-parse CVSS 3.1CRITICAL 9.1
- TI-2022-00432 Authorization Bypass Through User-Controlled Key in unshiftio/url-parse CVSS 3.1MEDIUM 5.3
- TI-2021-02606 Open Redirect in unshiftio/url-parse CVSS 3.1MEDIUM 5.3
- TI-2022-00556 Authorization Bypass Through User-Controlled Key in unshiftio/url-parse CVSS 3.1MEDIUM 5.3
Sources
- CVE-2021-27515 · CVE Program
- CVE-2021-27515 · NVD
- FIRST EPSS
- GHSA-9m6j-fcg5-2442 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-27515 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences