{"cve":"CVE-2020-1913","nvd":{"published":"2020-09-09T19:15:21.007","modified":"2026-06-17T03:02:36.257","status":"Modified","description":"An Integer signedness error in the JavaScript Interpreter in Facebook Hermes prior to commit 2c7af7ec481ceffd0d14ce2d7c045e475fd71dc6 allows attackers to cause a denial of service attack or a potential RCE 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-681","CWE-195"],"references":["https://github.com/facebook/hermes/commit/2c7af7ec481ceffd0d14ce2d7c045e475fd71dc6","https://www.facebook.com/security/advisories/cve-2020-1913","https://github.com/facebook/hermes/commit/2c7af7ec481ceffd0d14ce2d7c045e475fd71dc6","https://www.facebook.com/security/advisories/cve-2020-1913"],"products":["facebook:hermes"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-1913","score":0.01202,"percentile":0.68245,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gmpm-xp43-f7g6","url":"https://osv.dev/vulnerability/GHSA-gmpm-xp43-f7g6","summary":"Signed to Unsigned Conversion Error in Facebook Hermes","modified":"2023-11-08T04:02:45.193601Z","packages":[{"ecosystem":"npm","name":"hermes-engine","purl":"pkg:npm/hermes-engine","ranges":["<0.5.2"],"fixed":["0.5.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}