CVE-2020-1915

Name: CVE-2020-1915
Creator: NVD / NIST
Published: 2020-10-26T21:15:12.193+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.58%

Last modified Jun 17, 2026

CVE-2020-1915 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An out-of-bounds read in the JavaScript Interpreter in Facebook Hermes prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0 allows attackers to cause a denial of service attack or possible further memory corruption via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. EPSS estimates a 1.58% chance of exploitation in the next 30 days.

Description

An out-of-bounds read in the JavaScript Interpreter in Facebook Hermes prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0 allows attackers to cause a denial of service attack or possible further memory corruption 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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.58%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Facebook	Hermes	< 2020-09-25

References

https://github.com/facebook/hermes/commit/8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2020-1915Vendor Advisory
https://github.com/facebook/hermes/commit/8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0Patch, Third Party Advisory
https://www.facebook.com/security/advisories/cve-2020-1915Vendor Advisory

Timeline

Published: Oct 26, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-1915?

How severe is CVE-2020-1915?

CVE-2020-1915 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.

How do I fix CVE-2020-1915?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-1915?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST