CVE-2026-42035: Axios is a promise based HTTP client for the browser and Node.js

Q: How do I fix CVE-2026-42035?

axios: upgrade to 0.31.1, 1.15.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-42035 being exploited?

CVE-2026-42035 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42035 affect?

CVE-2026-42035 affects axios. Severity is high (CVSS 7.4). Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into

Q: How urgent is CVE-2026-42035?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.4REMOTEUPGRADE

CVE-2026-42035 is a high-severity flaw (CVSS 7.4) affecting axios. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into outgoing requests. The vulnerability exploits duck-type checking of the data payload, where if Object.prototype is polluted with getHeaders, append, pipe, on, once, and Symbol.toStringTag, Axios misidentifies

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-113, CWE-1321
Published	2026-04-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: axios

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 18:16 UTCPublished CVE record published
2026-06-17 10:47 UTCUpdated Record last modified

axios axios UPGRADE

Affected: < 0.31.1 · >= 1.0.0 and < 1.15.1

Fixed in: 0.31.1, 1.15.1

Safe to downgrade to: a release before 1.0.0

1. Check installed version

npm ls axios

2. UPGRADE to 0.31.1

npm install axios@">=0.31.1"

3. If no update is available yet, DOWNGRADE to a release before 1.0.0

npm view axios versions npm install axios@"<1.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42035?

axios: upgrade to 0.31.1, 1.15.1. Exact commands for each OS are on this page.

Is CVE-2026-42035 being exploited?

CVE-2026-42035 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42035 affect?

CVE-2026-42035 affects axios. Severity is high (CVSS 7.4). Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into

How urgent is CVE-2026-42035?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities · Axios vulnerabilities

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References

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