CVE-2021-23594
Sandbox Bypass
CVE-2021-23594 is a critical vulnerability (CVSS 9.8) in Agoric Realms-shim, published January 7, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.82%, the 79th percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.1, CVE List
- Exploit chance
- 1.82%EPSS, 79th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
realms-shimnpm | through 1.2.2 | None known |
What each source reports
CVE List Score used
Sandbox Bypass
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
- Record
CVE-2021-23594- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P - Updated
- 2026-11-02
EUVDEUVD-2022-0668
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
- Record
EUVD-2022-0668- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pwm7-qr6j-3vjg
Prototype Pollution in realms-shim
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
- Record
GHSA-pwm7-qr6j-3vjg- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
- Record
CVE-2021-23594- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVGHSA-pwm7-qr6j-3vjg
Prototype Pollution in realms-shim
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
- Record
GHSA-pwm7-qr6j-3vjg- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.