CVE-2021-23594 json
Sandbox Bypass
published 2022-01-07 4 y ago modified 2026-06-17 4 mo ago also GHSA-pwm7-qr6j-3vjg , EUVD-2022-0668
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
All versions of package realms-shim are vulnerable to Sandbox Bypass via a Prototype Pollution attack vector.
Exploit prediction
1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- snyk.io https://snyk.io/vuln/SNYK-JS-REALMSSHIM-2309907 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | realms-shim | <=1.2.2 |
no fix listed |
Affected products
- n/a realms-shim
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
snyk.io
/vuln/SNYK-JS-REALMSSHIM-2309907
web, exploit, third-party-advisory
-
npmjs.com
/package/realms-shim
web, product, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-23594
advisory
-
github.com
/Agoric/realms-shim
package
Sources
- CVE List CVE-2021-23594
- GitHub Advisory GHSA-pwm7-qr6j-3vjg
- NVD CVE-2021-23594
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.