How severe is CVE-2026-42039?

CVE-2026-42039 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-2026-42039 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-2026-42039?

CVE-2026-42039 affects Axios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42039?

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.

Does CVE-2026-42039 have an EU (EUVD) identifier?

Yes. CVE-2026-42039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25605.

When was CVE-2026-42039 published?

CVE-2026-42039 was published on 2026-04-24 and last updated on 2026-07-01.

CVE-2026-42039

CVE-2026-42039 is a high-severity vulnerability in Axios 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)
CVSS v4: 6.9
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25605
Weakness: CWE-674
Affected product: Axios
Published: 2026-04-24
Last modified: 2026-07-01

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, toFormData recursively walks nested objects with no depth limit, so a deeply nested value passed as request data crashes the Node.js process with a RangeError. This vulnerability is fixed in 1.15.1 and 0.31.1.

Frequently asked questions

What is CVE-2026-42039?: Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, toFormData recursively walks nested objects with no depth limit, so a deeply nested value passed as request data crashes the Node.js process with a RangeError. This vulnerability is fixed in 1.15.1 and 0.31.1.
How severe is CVE-2026-42039?: CVE-2026-42039 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-2026-42039 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-2026-42039?: CVE-2026-42039 affects Axios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42039?: 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.
Does CVE-2026-42039 have an EU (EUVD) identifier?: Yes. CVE-2026-42039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25605.
When was CVE-2026-42039 published?: CVE-2026-42039 was published on 2026-04-24 and last updated on 2026-07-01.

References

Affected products (1)

cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

157.66.35.106 (ipv4-addr)