How severe is CVE-2022-37266?

CVE-2022-37266 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-2022-37266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-37266?

CVE-2022-37266 affects Stealjs Steal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-37266?

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-2022-37266 published?

CVE-2022-37266 was published on 2022-09-15 and last updated on 2026-06-17.

CVE-2022-37266

CVE-2022-37266 is a critical-severity vulnerability in Stealjs Steal 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-1321.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Stealjs Steal
Published: 2022-09-15
Last modified: 2026-06-17

Description

Prototype pollution vulnerability in function extend in babel.js in stealjs steal 2.2.4 via the key variable in babel.js.

Frequently asked questions

What is CVE-2022-37266?: Prototype pollution vulnerability in function extend in babel.js in stealjs steal 2.2.4 via the key variable in babel.js.
How severe is CVE-2022-37266?: CVE-2022-37266 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-2022-37266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-37266?: CVE-2022-37266 affects Stealjs Steal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-37266?: 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-2022-37266 published?: CVE-2022-37266 was published on 2022-09-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:stealjs:steal:2.2.4:*:*:*:*:node.js:*:*

More vulnerabilities in Stealjs Steal

CVE-2022-37265 — Critical (CVSS 9.8): Prototype pollution vulnerability in stealjs steal 2.2.4 via the alias variable in babel.js.
CVE-2022-37258 — Critical (CVSS 9.8): Prototype pollution vulnerability in function convertLater in npm-convert.js in stealjs steal 2.2.4 via the packageName…
CVE-2022-37264 — Critical (CVSS 9.8): Prototype pollution vulnerability in stealjs steal 2.2.4 via the optionName variable in main.js.
CVE-2022-37257 — Critical (CVSS 9.8): Prototype pollution vulnerability in function convertLater in npm-convert.js in stealjs steal 2.2.4 via the…
CVE-2022-37259 — High (CVSS 7.5): A Regular Expression Denial of Service (ReDoS) flaw was found in stealjs steal 2.2.4 via the string variable in…
CVE-2022-37260 — High (CVSS 7.5): A Regular Expression Denial of Service (ReDoS) flaw was found in stealjs steal 2.2.4 via the input variable in main.js.

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