CVE-2026-39865: Axios is a promise based HTTP client for the browser and Node.js

Q: How do I fix CVE-2026-39865?

axios: upgrade to 1.13.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-39865 being exploited?

CVE-2026-39865 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-2026-39865 affect?

CVE-2026-39865 affects axios. Severity is medium (CVSS 5.9). Axios is a promise based HTTP client for the browser and Node.js. Starting in version 1.13.0 and prior to 1.13.2, Axios HTTP/2 session cleanup logic contains a state corruption bug that allows a malicious server to crash the client process

Q: How urgent is CVE-2026-39865?

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

This week

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-39865 is a medium-severity flaw (CVSS 5.9) 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. Starting in version 1.13.0 and prior to 1.13.2, Axios HTTP/2 session cleanup logic contains a state corruption bug that allows a malicious server to crash the client process through concurrent session closures. The vulnerability exists in the Http2Sessions.getSession() method in lib/adapters/http.js. The session cleanup logic contains a control flow error when removing sessions fro

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-400, CWE-662
Published	2026-04-08
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 15:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

axios axios UPGRADE

Affected: >= 1.0.0 and < 1.13.2

Fixed in: 1.13.2

Safe to downgrade to: a release before 1.0.0

1. Check installed version

npm ls axios

2. UPGRADE to 1.13.2

npm install axios@">=1.13.2"

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-2026-39865?

axios: upgrade to 1.13.2. Exact commands for each OS are on this page.

Is CVE-2026-39865 being exploited?

CVE-2026-39865 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-2026-39865 affect?

CVE-2026-39865 affects axios. Severity is medium (CVSS 5.9). Axios is a promise based HTTP client for the browser and Node.js. Starting in version 1.13.0 and prior to 1.13.2, Axios HTTP/2 session cleanup logic contains a state corruption bug that allows a malicious server to crash the client process

How urgent is CVE-2026-39865?

Priority 44/100. 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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