CVEvulnerability
CVE-2020-1914
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2020-10-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-670
Description
A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically 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 configurations
• facebook hermes (< 2020-10-01)
Related
Weakness · CWE (1)
- CWE-670 Always-Incorrect Control Flow Implementation weakness
References
- https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc Patch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1914 Vendor Advisory
- https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc Patch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1914 Vendor Advisory