What is CVE-2020-1914?

CVE-2020-1914 is a critical-severity vulnerability in Facebook Hermes, classified under Always-Incorrect Control Flow Implementation. CVSS score: 9.8/10. Published 2020-10-08.

How severe is CVE-2020-1914?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-1914 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Facebook Hermes

CVE-2020-1914

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 vi…

EPSS: 0.025 (83.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook Hermes — versions commit prior to b2021df620824627f5a8c96615edbd1eb7fdddfc

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

Public proof-of-concept exploits

References

cve-assign@fb.com (x_refsource_CONFIRM, Vendor Advisory)
cve-assign@fb.com (x_refsource_CONFIRM, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-1914?: CVE-2020-1914 is a critical-severity vulnerability in Facebook Hermes, classified under Always-Incorrect Control Flow Implementation. CVSS score: 9.8/10. Published 2020-10-08.
How severe is CVE-2020-1914?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-1914 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.