CVE-2020-1914 - CVE House
Back to Database
Status published Critical CVE-2020-1914

A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-1914

Credits & Attribution

No credits recorded in the NVD database.

References

More from Facebook

View All →
CVE-2025-64296
WordPress Facebook for WooCommerce plugin <= 3.5.7 - Broken Access Control to Notice Dismissal vulnerability
Medium 5.3
CVE-2025-55181
Sending an HTTP request/response body with greater than 2^31 bytes...
Medium 5.3
CVE-2025-55179
Incomplete validation of rich response messages in WhatsApp for iOS...
Medium 5.4
CVE-2025-55177
Incomplete authorization of linked device synchronization messages in WhatsApp for...
Medium 5.4
CVE-2025-30403
A heap-buffer-overflow vulnerability is possible in mvfst via a specially...
Unknown 0

Affected Vendor

Affected Software

Hermes
Vulnerable Versions:
commit prior to b2021df620824627f5a8c96615edbd1eb7fdddfc

Timeline

Official Publish: October 8th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-670

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.