How severe is CVE-2026-42034?

CVE-2026-42034 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 none, and availability low.

Is CVE-2026-42034 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-2026-42034?

CVE-2026-42034 affects Axios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42034?

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

Does CVE-2026-42034 have an EU (EUVD) identifier?

Yes. CVE-2026-42034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25601.

When was CVE-2026-42034 published?

CVE-2026-42034 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-42034

CVE-2026-42034 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-770.

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-2026-25601
Weakness: CWE-770
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. Prior to 1.15.1 and 0.31.1, for stream request bodies, maxBodyLength is bypassed when maxRedirects is set to 0 (native http/https transport path). Oversized streamed uploads are sent fully even when the caller sets strict body limits. This vulnerability is fixed in 1.15.1 and 0.31.1.

Frequently asked questions

What is CVE-2026-42034?: Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, for stream request bodies, maxBodyLength is bypassed when maxRedirects is set to 0 (native http/https transport path). Oversized streamed uploads are sent fully even when the caller sets strict body limits. This vulnerability is fixed in 1.15.1 and 0.31.1.
How severe is CVE-2026-42034?: CVE-2026-42034 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 none, and availability low.
Is CVE-2026-42034 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-2026-42034?: CVE-2026-42034 affects Axios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42034?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42034 have an EU (EUVD) identifier?: Yes. CVE-2026-42034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25601.
When was CVE-2026-42034 published?: CVE-2026-42034 was published on 2026-04-24 and last updated on 2026-06-17.

References

https://github.com/axios/axios/security/advisories/GHSA-5c9x-8gcm-mpgx

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)