CVE-2020-1912

Published: Sep 9, 2020Modified: Jun 17, 2026

8.1

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.2 / Impact: 5.9

Source: NVD

Description

An out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions in Facebook Hermes prior to commit 091835377369c8fd5917d9b87acffa721ad2a168 allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Affected (1)

Products: Facebook: Hermes

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Facebook Hermes	Up to 0.4.3

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (4)

https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168

Source: cve-assign@fb.com

PatchThird Party Advisory

https://www.facebook.com/security/advisories/cve-2020-1912

Source: cve-assign@fb.com

Vendor Advisory

https://github.com/facebook/hermes/commit/091835377369c8fd5917d9b87acffa721ad2a168

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://www.facebook.com/security/advisories/cve-2020-1912

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.