CVE-2023-25933

9.8 criticalEPSS 0.9%

A type confusion bug in TypedArray prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could have been used by a malicious attacker to execute arbitrary code via untrusted JavaScript. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-843
Published: 2023-05-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

facebook:hermes

References

https://github.com/facebook/hermes/commit/e6ed9c1a4b02dc219de1648f44cd808a56171b81
https://www.facebook.com/security/advisories/cve-2023-25933
https://github.com/facebook/hermes/commit/e6ed9c1a4b02dc219de1648f44cd808a56171b81
https://www.facebook.com/security/advisories/cve-2023-25933

Check your stack JSON