Prototype pollution in just-safe-set
Priority MEDIUM 48CWE-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
Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.
Why it matters now
EPSS 0.03337 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed just-safe-set (npm): 2.2.2
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 |
|---|---|---|---|---|---|
| — | just-safe-set | 1.0.0, 1.1.0, 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.2.1, 2.2.2 | — | No fix listed | CNA |
| — | just-safe-set (npm) | 1.0.0 to before 2.2.2 | 2.2.2 | Patch available | GHSA-v26w-gcxh-v4r7 |
- just-safe-set Vendor— Affected 1.0.0, 1.1.0, 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.2.1, 2.2.2 Fixed in — No fix listed CNA
- just-safe-set (npm) Vendor— Affected 1.0.0 to before 2.2.2 Fixed in 2.2.2 Patch available GHSA-v26w-gcxh-v4r7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:just-safe-set_project:just-safe-set:*:*:*:*:*:node.js:*:* | 1.0.0 – 2.2.1 | Vulnerable | Just-safe-set Project |
- cpe:2.3:a:just-safe-set_project:just-safe-set:*:*:*:*:*:node.js:*:* Versions 1.0.0 – 2.2.1 Vulnerable ·Just-safe-set Project
Remediation
- Fix · GHSA-v26w-gcxh-v4r7 just-safe-set (npm) Fixed in 2.2.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25952
- 2026-10-03 Alias added: GHSA-v26w-gcxh-v4r7
References
Sources
- CVE-2021-25952 · CVE Program
- CVE-2021-25952 · NVD
- FIRST EPSS
- GHSA-v26w-gcxh-v4r7 · GitHub Advisory Database · CC BY 4.0
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