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CVE-2020-1914

25
FAUCET Score

CVE-2020-1914 is a critical logic vulnerability in Facebook Hermes (prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc) that could allow attackers to read out-of-bounds memory or theoretically execute arbitrary code through crafted JavaScript. This vulnerability is rated 9.8 (CRITICAL) on the CVSS scale, indicating a severe risk with network accessibility and no user interaction required for exploitation. However, it is only exploitable if the application using Hermes allows evaluation of untrusted JavaScript, meaning most React Native applications are not affected. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2020-10-01CPE matchmatch criteria
cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.51%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0251 is in the 73rd percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: hermes-engineFixed in: 0.7.2

Vendor Advisories (1)

npmGHSA-327c-qx3v-h673critical

Always-Incorrect Control Flow Implementation in Facebook Hermes

May 24, 2022

References

github.com / facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc
PatchThird Party Advisory
facebook.com / security/advisories/cve-2020-1914
Vendor Advisory