TI-2020-01823 Aliases CVE-2020-1896 GHSA-28c6-6wvh-6235

Stack-based buffer overflow in Meta Hermes

MEDIUM 47CWE-121Published 2021-02-02 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

A stack overflow vulnerability in Facebook Hermes 'builtin apply' prior to commit 86543ac47e59c522976b5632b8bf9a2a4583c7d2 (https://github.com/facebook/hermes/commit/86543ac47e59c522976b5632b8bf9a2a4583c7d2) allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Why it matters now

EPSS 0.02523 84th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Meta	Hermes	commit prior to 86543ac47e59c522976b5632b8bf9a2a4583c7d2	—	No fix listed	CNA

Hermes VendorMeta Affected commit prior to 86543ac47e59c522976b5632b8bf9a2a4583c7d2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:facebook:hermes::::::::	before 0.5.0	Vulnerable	Meta

cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:* Versions before 0.5.0 Vulnerable ·Meta

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-1896
2026-10-03 Alias added: GHSA-28c6-6wvh-6235

References

Patch 1

https://github.com/facebook/hermes/commit/86543ac47e59c522976b5632b8bf9a2a4583c7d2

Advisory 1

https://www.facebook.com/security/advisories/cve-2020-1896

TI-2023-14306 Use after free in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-12661 Use after free in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-11181 Type confusion in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-09388 Type confusion in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-09387 Out-of-bounds write in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2020-01841 A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes… CVSS 3.1CRITICAL 9.8

See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences