How severe is CVE-2026-42037?

CVE-2026-42037 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-42037 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42037?

CVE-2026-42037 affects Axios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42037?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42037 have an EU (EUVD) identifier?

Yes. CVE-2026-42037 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25603.

When was CVE-2026-42037 published?

CVE-2026-42037 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-42037

CVE-2026-42037 is a medium-severity vulnerability in Axios with a CVSS 3.x base score of 5.3. 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-93.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25603
Weakness: CWE-93
Affected product: Axios
Published: 2026-04-24
Last modified: 2026-06-17

Description

Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.1, the FormDataPart constructor in lib/helpers/formDataToStream.js interpolates value.type directly into the Content-Type header of each multipart part without sanitizing CRLF (\r\n) sequences. An attacker who controls the .type property of a Blob/File-like object (e.g., via a user-uploaded file in a Node.js proxy service) can inject arbitrary MIME part headers into the multipart form-data body. This bypasses Node.js v18+ built-in header protections because the injection targets the multipart body structure, not HTTP request headers. This vulnerability is fixed in 1.15.1.

Frequently asked questions

What is CVE-2026-42037?: Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.1, the FormDataPart constructor in lib/helpers/formDataToStream.js interpolates value.type directly into the Content-Type header of each multipart part without sanitizing CRLF (\r\n) sequences. An attacker who controls the .type property of a Blob/File-like object (e.g., via a user-uploaded file in a Node.js proxy service) can inject arbitrary MIME part headers into the multipart form-data body. This bypasses Node.js v18+ built-in header protections because the injection targets the multipart body structure, not HTTP request headers. This vulnerability is fixed in 1.15.1.
How severe is CVE-2026-42037?: CVE-2026-42037 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-42037 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42037?: CVE-2026-42037 affects Axios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42037?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42037 have an EU (EUVD) identifier?: Yes. CVE-2026-42037 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25603.
When was CVE-2026-42037 published?: CVE-2026-42037 was published on 2026-04-24 and last updated on 2026-06-17.

References

https://github.com/axios/axios/security/advisories/GHSA-445q-vr5w-6q77

Affected products (1)

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

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Other CWE-93 (CRLF Injection) vulnerabilities

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CVE-2026-90937 — Critical (CVSS 9.9): froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect URLs, allowing authenticated…
CVE-2026-70615 — Critical (CVSS 9.9): boringproxy through 0.10.0 contains a newline injection vulnerability that allows authenticated low-privileged users…
CVE-2026-45372 — Critical (CVSS 9.9): cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, when cpp-httplib's…

Browse all CWE-93 (CRLF Injection) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

170.106.103.20 (ipv4-addr)
157.66.35.106 (ipv4-addr)
172.234.29.193 (ipv4-addr)
158.180.72.217 (ipv4-addr)