Prototype pollution in purl
Priority MEDIUM 41CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.
Why it matters now
EPSS 0.01606 76th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | purl | 2.3.2 | — | No fix listed | CNA |
- purl Vendor— Affected 2.3.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:purl_project:purl:2.3.2:*:*:*:*:*:*:* | 2.3.2 | Vulnerable | Purl Project |
- cpe:2.3:a:purl_project:purl:2.3.2:*:*:*:*:*:*:* Versions 2.3.2 Vulnerable ·Purl Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20089
- 2026-10-03 Alias added: GHSA-fc5x-mj45-vx78
References
Sources
- CVE-2021-20089 · CVE Program
- CVE-2021-20089 · NVD
- FIRST EPSS
- GHSA-fc5x-mj45-vx78 · GitHub Advisory Database · CC BY 4.0
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