CVE-2026-39865

Axios HTTP/2 Session Cleanup State Corruption Vulnerability

MEDIUM
5.9
CVSS Score
Published: April 8, 2026 at 02:25 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
1 product affected across 1 vendorAxios

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

Axios is a promise based HTTP client for the browser and Node.js. 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 from the sessions array. This vulnerability is fixed in 1.13.2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.13.21.0.0 ≤ v < 1.13.2
Affected range stops below 1.13.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-662

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