Prototype pollution in mathjs
Priority LOW 39CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Partial Red Hat: 1 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-915.
Summary
The package mathjs before 7.5.1 are vulnerable to Prototype Pollution via the deepExtend function that runs upon configuration updates.
Why it matters now
EPSS 0.03924 90th percentileScored 2026-11-07
Fix Partial mathjs: 7.5.1mathjs (npm): 7.5.1Red Hat: 1 advisoryRed Hat: 1 fixed, 1 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 |
|---|---|---|---|---|---|
| — | mathjs | before 7.5.1 | 7.5.1 | Patch available | CNA |
| — | mathjs (npm) | before 7.5.1 | 7.5.1 | Patch available | GHSA-x2fc-mxcx-w4mf |
- mathjs Vendor— Affected before 7.5.1 Fixed in 7.5.1 Patch available CNA
- mathjs (npm) Vendor— Affected before 7.5.1 Fixed in 7.5.1 Patch available GHSA-x2fc-mxcx-w4mf
Remediation
- Fix · CNA mathjs Fixed in 7.5.1
- Fix · GHSA-x2fc-mxcx-w4mf mathjs (npm) Fixed in 7.5.1 Advisory →
Red Hat 1 advisory
- RHSA-2020:5249 Released 2020-11-30 · Red Hat rating Moderatesecurity update - Red Hat Ansible Tower 3.7.4-1 - RHEL7 Container
- Red Hat Ansible Tower 3.7 for RHEL 7 ansible-tower-37/ansible-tower-rhel7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ansible Tower 3 | Affected | No fix planned: Out of support scope |
| Red Hat Ansible Tower 3.7 for RHEL 7 | Fixed | RHSA-2020:5249 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-7743
- 2026-10-03 Alias added: GHSA-x2fc-mxcx-w4mf
References
Advisory 2
More math.js Mathjs vulnerabilities
- TI-2026-29767 Unsafe array index getter in mathjs CVSS 3.0HIGH 8.8
- TI-2026-29553 Math.js: Unsafe object property setter in mathjs CVSS 3.1HIGH 8.8
Sources
- CVE-2020-7743 · CVE Program
- CVE-2020-7743 · NVD
- FIRST EPSS
- GHSA-x2fc-mxcx-w4mf · GitHub Advisory Database · CC BY 4.0
- CVE-2020-7743 · Red Hat security data · CC BY 4.0
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