brikcss merge prototype pollution
Priority HIGH 70CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.
Summary
A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00336 27th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| brikcss | merge | 1.0; 1.1; 1.2; 1.3.0 | — | No fix listed | CNA |
| — | @brikcss/merge (npm) | up to 1.3.1 | — | No fix listed | GHSA-3jc6-6r48-v6qf |
- merge Vendorbrikcss Affected 1.0; 1.1; 1.2; 1.3.0 Fixed in — No fix listed CNA
- @brikcss/merge (npm) Vendor— Affected up to 1.3.1 Fixed in — No fix listed GHSA-3jc6-6r48-v6qf
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-6594
- 2026-10-03 Alias added: GHSA-3jc6-6r48-v6qf
References
Sources
- CVE-2026-6594 · CVE Program
- CVE-2026-6594 · NVD
- FIRST EPSS
- GHSA-3jc6-6r48-v6qf · 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