Prototype pollution in putil-merge
Priority MEDIUM 47CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.
Why it matters now
EPSS 0.02961 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed putil-merge (npm): 3.7.0
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 |
|---|---|---|---|---|---|
| — | putil-merge | 3.6.6, 3.6.5, 3.6.4, 3.6.3, 3.6.2, 3.6.1, 3.6.0, 3.5.2, 3.5.1, 3.5.0, 3.4.2, 3.4.1, 3.3.0, 3.2.0, 3.1.4, 3.1.3, 3.1.2, 3.1.1, 3.1.0, 3.0.0, 2.2.0, 2.1.0, 2.0.2, 2.0.1, 2.0.0, 1.2.0, 1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0, 1.0.2, 1.0.1, 1.0.0 | — | No fix listed | CNA |
| — | putil-merge (npm) | 1.0.0 to before 3.7.0 | 3.7.0 | Patch available | GHSA-9x7m-9hpg-xxmw |
- putil-merge Vendor— Affected 3.6.6, 3.6.5, 3.6.4, 3.6.3, 3.6.2, 3.6.1, 3.6.0, 3.5.2, 3.5.1, 3.5.0, 3.4.2, 3.4.1, 3.3.0, 3.2.0, 3.1.4, 3.1.3, 3.1.2, 3.1.1, 3.1.0, 3.0.0, 2.2.0, 2.1.0, 2.0.2, 2.0.1, 2.0.0, 1.2.0, 1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0, 1.0.2, 1.0.1, 1.0.0 Fixed in — No fix listed CNA
- putil-merge (npm) Vendor— Affected 1.0.0 to before 3.7.0 Fixed in 3.7.0 Patch available GHSA-9x7m-9hpg-xxmw
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:putil-merge_project:putil-merge:*:*:*:*:*:*:*:* | 1.0.0 – 3.6.6 | Vulnerable | Putil-merge Project |
- cpe:2.3:a:putil-merge_project:putil-merge:*:*:*:*:*:*:*:* Versions 1.0.0 – 3.6.6 Vulnerable ·Putil-merge Project
Remediation
- Fix · GHSA-9x7m-9hpg-xxmw putil-merge (npm) Fixed in 3.7.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25953
- 2026-10-03 Alias added: GHSA-9x7m-9hpg-xxmw
References
More Putil-merge Project Putil-merge vulnerabilities
- TI-2021-06146 Prototype pollution in putil-merge CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-25953 · CVE Program
- CVE-2021-25953 · NVD
- FIRST EPSS
- GHSA-9x7m-9hpg-xxmw · GitHub Advisory Database · CC BY 4.0
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