How severe is CVE-2022-32234?

CVE-2022-32234 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-32234 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-32234?

CVE-2022-32234 affects Facebook Hermes. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-32234?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-32234 published?

CVE-2022-32234 was published on 2022-10-11 and last updated on 2026-06-17.

CVE-2022-32234

CVE-2022-32234 is a critical-severity vulnerability in Facebook Hermes with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Facebook Hermes
Published: 2022-10-11
Last modified: 2026-06-17

Description

An out of bounds write in hermes, while handling large arrays, prior to commit 06eaec767e376bfdb883d912cb15e987ddf2bda1 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.

Frequently asked questions

What is CVE-2022-32234?: An out of bounds write in hermes, while handling large arrays, prior to commit 06eaec767e376bfdb883d912cb15e987ddf2bda1 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.
How severe is CVE-2022-32234?: CVE-2022-32234 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-32234 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-32234?: CVE-2022-32234 affects Facebook Hermes. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-32234?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-32234 published?: CVE-2022-32234 was published on 2022-10-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:*

More vulnerabilities in Facebook Hermes

CVE-2023-30470 — Critical (CVSS 9.8): A use-after-free related to unsound inference in the bytecode generation when optimizations are enabled for Hermes…
CVE-2023-28081 — Critical (CVSS 9.8): A bytecode optimization bug in Hermes prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could be used to cause…
CVE-2023-25933 — Critical (CVSS 9.8): A type confusion bug in TypedArray prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could have been used by a…
CVE-2023-23557 — Critical (CVSS 9.8): An error in Hermes' algorithm for copying objects properties prior to commit a00d237346894c6067a594983be6634f4168c9ad…
CVE-2023-23556 — Critical (CVSS 9.8): An error in BigInt conversion to Number in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have…
CVE-2022-40138 — Critical (CVSS 9.8): An integer conversion error in Hermes bytecode generation, prior to commit 6aa825e480d48127b480b08d13adf70033237097,…

All CVEs affecting Facebook Hermes →

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