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TI-2022-15967 Aliases CVE-2022-35289GHSA-mc36-3fhx-66vv

Integer overflow in Meta Hermes

Priority MEDIUM 44CWE-680Published · Updated

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
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

A write-what-where condition in hermes caused by an integer overflow, prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374 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 0.01202 68th percentileScored 2026-11-07
Fix Fixed Hermes (Facebook): prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MetaHermesbefore prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374Patch availableCNA
  • Hermes VendorMeta Affected before prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374 Fixed in prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:*before 0.12.0VulnerableMeta
  • cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:* Versions before 0.12.0 Vulnerable ·Meta

Remediation

  • Fix · CNA Hermes (Facebook) Fixed in prior to commit 5b6255ae049fa4641791e47fad994e8e8c4da374

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-35289
  2. 2026-10-03 Alias added: GHSA-mc36-3fhx-66vv

References

Patch 1

Advisory 1

  • 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