CVE-2023-24833

7.5 highEPSS 0.6%

High (7.5) in facebook hermes. EPSS 0.6% chance of exploitation in the next 30 days.

A use-after-free in BigIntPrimitive addition in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by an attacker to leak raw data from Hermes VM’s heap. 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

7.5 high

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 50% 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/a6dcafe6ded8e61658b40f5699878cd19a481f80
https://www.facebook.com/security/advisories/cve-2023-24833
https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80
https://www.facebook.com/security/advisories/cve-2023-24833

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