Prototype Pollution in deepmerge-ts
Priority MEDIUM 46CWE-915Published · 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
deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. deepmerge-ts is vulnerable to Prototype Pollution via file deepmerge.ts, function defaultMergeRecords(). This issue has been patched in version 4.0.2. There are no known workarounds for this issue.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01678 77th percentileScored 2026-11-07
Fix Fixed deepmerge-ts (RebeccaStevens): 4.0.2deepmerge-ts (npm): 4.0.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| RebeccaStevens | deepmerge-ts | before 4.0.2 | 4.0.2 | Patch available | CNA |
| — | deepmerge-ts (npm) | before 4.0.2 | 4.0.2 | Patch available | GHSA-r9w3-g83q-m6hq |
- deepmerge-ts VendorRebeccaStevens Affected before 4.0.2 Fixed in 4.0.2 Patch available CNA
- deepmerge-ts (npm) Vendor— Affected before 4.0.2 Fixed in 4.0.2 Patch available GHSA-r9w3-g83q-m6hq
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:deepmerge-ts_project:deepmerge-ts:*:*:*:*:*:*:*:* | before 4.0.2 | Vulnerable | Deepmerge-ts Project |
- cpe:2.3:a:deepmerge-ts_project:deepmerge-ts:*:*:*:*:*:*:*:* Versions before 4.0.2 Vulnerable ·Deepmerge-ts Project
Remediation
- Fix · CNA deepmerge-ts (RebeccaStevens) Fixed in 4.0.2
- Fix · GHSA-r9w3-g83q-m6hq deepmerge-ts (npm) Fixed in 4.0.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2022-24802
- 2026-10-03 Alias added: GHSA-r9w3-g83q-m6hq
References
Patch 2
Advisory 2
More RebeccaStevens vulnerabilities
- TI-2026-29120 deepmerge-ts: Stack exhaustion when merging recursive object graphs CVSS 4.0HIGH 8.2
Sources
- CVE-2022-24802 · CVE Program
- CVE-2022-24802 · NVD
- FIRST EPSS
- GHSA-r9w3-g83q-m6hq · GitHub Advisory Database · CC BY 4.0
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