How severe is CVE-2020-12079?

CVE-2020-12079 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-12079 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12079?

CVE-2020-12079 affects Beakerbrowser Beaker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12079?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-12079 published?

CVE-2020-12079 was published on 2020-04-23 and last updated on 2026-06-17.

CVE-2020-12079

CVE-2020-12079 is a critical-severity vulnerability in Beakerbrowser Beaker with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Beakerbrowser Beaker
Published: 2020-04-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-12079?: 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.
How severe is CVE-2020-12079?: CVE-2020-12079 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12079 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12079?: CVE-2020-12079 affects Beakerbrowser Beaker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12079?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-12079 published?: CVE-2020-12079 was published on 2020-04-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:beakerbrowser:beaker:*:*:*:*:*:*:*:*

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