Prototype Pollution in viking04/merge
Priority MEDIUM 45CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-915.
Summary
merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Why it matters now
EPSS 0.01429 73rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed viking04/merge (viking04): 1.0.2@viking04/merge (npm): 1.0.2
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 |
|---|---|---|---|---|---|
| viking04 | viking04/merge | before 1.0.2 | 1.0.2 | Patch available | CNA |
| — | @viking04/merge (npm) | before 1.0.2 | 1.0.2 | Patch available | GHSA-cqqh-49mx-fq63 |
- viking04/merge Vendorviking04 Affected before 1.0.2 Fixed in 1.0.2 Patch available CNA
- @viking04/merge (npm) Vendor— Affected before 1.0.2 Fixed in 1.0.2 Patch available GHSA-cqqh-49mx-fq63
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:merge_project:merge:*:*:*:*:*:node.js:*:* | before 1.0.2 | Vulnerable | Merge Project |
- cpe:2.3:a:merge_project:merge:*:*:*:*:*:node.js:*:* Versions before 1.0.2 Vulnerable ·Merge Project
Remediation
- Fix · CNA viking04/merge (viking04) Fixed in 1.0.2
- Fix · GHSA-cqqh-49mx-fq63 @viking04/merge (npm) Fixed in 1.0.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3645
- 2026-10-03 Alias added: GHSA-cqqh-49mx-fq63
References
More Merge Project Merge vulnerabilities
- TI-2020-17302 Prototype pollution in merge CVSS 3.1CRITICAL 9.8
- TI-2021-06090 Prototype pollution in @ianwalter/merge CVSS 3.1CRITICAL 9.8
- TI-2018-11811 Uncontrolled resource consumption in HackerOne merge CVSS 3.1HIGH 7.5
Sources
- CVE-2021-3645 · CVE Program
- CVE-2021-3645 · NVD
- FIRST EPSS
- GHSA-cqqh-49mx-fq63 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences