Sandbox Bypass
Priority MEDIUM 46CWE-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
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
Why it matters now
EPSS 0.0182 78th percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| — | realms-shim | all versions | — | No fix listed | CNA |
| — | realms-shim (npm) | up to 1.2.2 | — | No fix listed | GHSA-q4j7-v27r-fgcx |
- realms-shim Vendor— Affected all versions Fixed in — No fix listed CNA
- realms-shim (npm) Vendor— Affected up to 1.2.2 Fixed in — No fix listed GHSA-q4j7-v27r-fgcx
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
realms-shim unspecified
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2021-06169 Sandbox BypassPriority MEDIUM 46
Timeline
- 2026-10-02 Threatist record created from CVE-2021-23543
- 2026-10-03 Alias added: GHSA-q4j7-v27r-fgcx
References
More Agoric Realms-shim vulnerabilities
- TI-2021-06169 Sandbox Bypass CVSS 3.1CRITICAL 10.0
Sources
- CVE-2021-23543 · CVE Program
- CVE-2021-23543 · NVD
- FIRST EPSS
- GHSA-q4j7-v27r-fgcx · 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