CVE-2020-12079 json
Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution.
published 2020-04-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4395
- cvss
- 10.0
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution. This occurs because Electron context isolation is not used, and therefore an attacker can conduct a prototype-pollution attack against the Electron internal messaging API.
Patch / fix
Exploit prediction
2.23% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| 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 |
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/beakerbrowser/beaker/issues/1519
third-party-advisory
-
github.com
/beakerbrowser/beaker/releases/tag/0.8.9
release-notes, third-party-advisory
Sources
- CVE List CVE-2020-12079
- NVD CVE-2020-12079
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.