How severe is CVE-2022-27810?

CVE-2022-27810 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-27810 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-27810?

CVE-2022-27810 affects Facebook Hermes. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-27810?

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

When was CVE-2022-27810 published?

CVE-2022-27810 was published on 2022-10-06 and last updated on 2026-06-17.

CVE-2022-27810

CVE-2022-27810 is a high-severity vulnerability in Facebook Hermes with a CVSS 3.x base score of 7.5. 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-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Facebook Hermes
Published: 2022-10-06
Last modified: 2026-06-17

Description

It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.

Frequently asked questions

What is CVE-2022-27810?: It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.
How severe is CVE-2022-27810?: CVE-2022-27810 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-27810 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-27810?: CVE-2022-27810 affects Facebook Hermes. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-27810?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-27810 published?: CVE-2022-27810 was published on 2022-10-06 and last updated on 2026-06-17.

References

https://www.facebook.com/security/advisories/cve-2022-27810

Affected products (1)

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

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