Cesanta MJS v2.20.0 was discovered to contain a global buffer overflow via snquote at src/mjs_json.c.
Priority LOW 35CWE-120Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Cesanta MJS v2.20.0 was discovered to contain a global buffer overflow via snquote at src/mjs_json.c.
Why it matters now
EPSS 0.00739 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-46526
- 2026-10-03 Alias added: GHSA-3449-q73h-pp22
References
More Cesanta Mjs vulnerabilities
- TI-2023-23198 Cesanta mjs v2.20.0 was discovered to contain a function pointer hijacking vulnerability… CVSS 3.1CRITICAL 9.8
- TI-2023-27057 An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via… CVSS 3.1HIGH 7.5
- TI-2023-27055 An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via… CVSS 3.1HIGH 7.5
- TI-2023-27054 An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via the mjs+0x4ec508 component. CVSS 3.1HIGH 7.5
- TI-2023-27056 An Out of Bounds Write in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial… CVSS 3.1HIGH 7.5
- TI-2023-27053 An issue in Cesanta mjs 2.20.0 allows a remote attacker to cause a denial of service via… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-46526 · CVE Program
- CVE-2021-46526 · NVD
- FIRST EPSS
- GHSA-3449-q73h-pp22 · GitHub Advisory Database · CC BY 4.0
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