{"cve":"CVE-2021-24044","nvd":{"published":"2022-01-15T01:15:07.943","modified":"2026-06-17T03:39:12.790","status":"Modified","description":"By passing invalid javascript code where await and yield were called upon non-async and non-generator getter/setter functions, Hermes would invoke generator functions and error out on invalid await/yield positions. This could result in segmentation fault as a consequence of type confusion error, with a low chance of RCE. This issue affects Hermes versions prior to v0.10.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-843"],"references":["https://www.facebook.com/security/advisories/cve-2021-24044","https://www.facebook.com/security/advisories/cve-2021-24044"],"products":["facebook:hermes"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2021-24044","score":0.0126,"percentile":0.69617,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-7mhc-prgv-r3q4","url":"https://osv.dev/vulnerability/GHSA-7mhc-prgv-r3q4","summary":"Access of Resource Using Incompatible Type in Hermes","modified":"2023-11-08T04:05:14.417618Z","packages":[{"ecosystem":"npm","name":"hermes-engine","purl":"pkg:npm/hermes-engine","ranges":["<0.10.0"],"fixed":["0.10.0"]}]}],"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."]}