CVE-2023-23556

An error in BigInt conversion to Number in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by a malicious attacker to execute arbitrary code due to an out-of-bound write. Note that this bug is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

• CWE-787

• https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80Patch
• https://www.facebook.com/security/advisories/cve-2023-23556Patch, Vendor Advisory
• https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80Patch
• https://www.facebook.com/security/advisories/cve-2023-23556Patch, Vendor Advisory

Published

May 18, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-23550An OS command injection vulnerability exists in the ys_third…7.2
• CVE-2023-23551 Control By Web X-600M devices run Lua scripts and are vul…9.8
• CVE-2023-23552On versions 17.0.x before 17.0.0.2, 16.1.x before 16.1.3.3, …7.5
• CVE-2023-23553 Control By Web X-400 devices are vulnerable to a cross-site…6.1
• CVE-2023-23554Uncontrolled search path element vulnerability exists in pg_…8.8
• CVE-2023-23555On BIG-IP Virtual Edition versions 15.1x beginning in 15.1.4…7.5
• CVE-2023-23557An error in Hermes' algorithm for copying objects properties…9.8
• CVE-2023-23558In Eternal Terminal 6.2.1, TelemetryService uses fixed paths…6.3
• CVE-2023-23559In rndis_query_oid in drivers/net/wireless/rndis_wlan.c in t…7.8
• CVE-2023-2356Relative Path Traversal in GitHub repository mlflow/mlflow p…7.5
• CVE-2023-23560In certain Lexmark products through 2023-01-12, SSRF can occ…9.8
• CVE-2023-23561Stormshield Endpoint Security 2.3.0 through 2.3.2 has Incorr…5.5