CVE-2023-28081

9.8 criticalEPSS 0.9%

Critical (9.8) in facebook hermes. EPSS 0.9% chance of exploitation in the next 30 days.

A bytecode optimization bug in Hermes prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could be used to cause an use-after-free and obtain arbitrary code execution via a carefully crafted payload. 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-416
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-2023-28081
https://github.com/facebook/hermes/commit/e6ed9c1a4b02dc219de1648f44cd808a56171b81
https://www.facebook.com/security/advisories/cve-2023-28081

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