What is CVE-2022-27810?

CVE-2022-27810 is a high-severity vulnerability in Facebook Hermes, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2022-10-06.

How severe is CVE-2022-27810?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Facebook Hermes

CVE-2022-27810

It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.

Published 2022-10-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.9th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001

Affected products

Facebook Hermes — versions 0.12.0, unspecified

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

www.facebook.com/security/advisories/cve-2022-27810 (Third Party Advisory)

Frequently asked questions

What is CVE-2022-27810?: CVE-2022-27810 is a high-severity vulnerability in Facebook Hermes, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2022-10-06.
How severe is CVE-2022-27810?: High severity. CVSS v3 base score is 7.5 out of 10.