Prototype pollution in safe-flat
Priority HIGH 82CWE-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 · CISA ADP. Fix status from CNA and GitHub.
Summary
Prototype pollution vulnerability in 'safe-flat' versions 2.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.03337 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed safe-flat (npm): 2.0.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- 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 |
|---|---|---|---|---|---|
| — | safe-flat | 2.0.0, 2.0.1 | — | No fix listed | CNA |
| — | safe-flat (npm) | 2.0.0 to before 2.0.2 | 2.0.2 | Patch available | GHSA-33rv-m2gp-mm2r |
- safe-flat Vendor— Affected 2.0.0, 2.0.1 Fixed in — No fix listed CNA
- safe-flat (npm) Vendor— Affected 2.0.0 to before 2.0.2 Fixed in 2.0.2 Patch available GHSA-33rv-m2gp-mm2r
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:safe-flat_project:safe-flat:*:*:*:*:*:*:*:* | 2.0.0 to before 2.0.2 | Vulnerable | Safe-flat Project |
- cpe:2.3:a:safe-flat_project:safe-flat:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.0.2 Vulnerable ·Safe-flat Project
Remediation
- Fix · GHSA-33rv-m2gp-mm2r safe-flat (npm) Fixed in 2.0.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-25927
- 2026-10-03 Alias added: GHSA-33rv-m2gp-mm2r
References
Sources
- CVE-2021-25927 · CVE Program
- CVE-2021-25927 · NVD
- FIRST EPSS
- GHSA-33rv-m2gp-mm2r · GitHub Advisory Database · CC BY 4.0
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