What is the CVSS score of CVE-2026-39865?

CVE-2026-39865 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Is there a patch available for CVE-2026-39865?

Yes, a patch is available for CVE-2026-39865. Update the affected software to the latest version immediately.

Node.js CVE-2026-39865

EUVD-2026-20501 MEDIUM

Uncontrolled Resource Consumption (CWE-400)

2026-04-08 GitHub_M

GHSA-qj83-cq47-w5f8

Node.js Denial Of Service

5.9

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.9 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Red Hat

5.9 MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Apr 08, 2026 - 20:30 nvd

Patch available

EUVD ID Assigned

Apr 08, 2026 - 15:16 euvd

EUVD-2026-20501

Analysis Generated

Apr 08, 2026 - 15:16 vuln.today

CVE Published

Apr 08, 2026 - 14:25 nvd

MEDIUM 5.9

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

25 npm packages depend on axios (15 direct, 10 indirect)

Ecosystem-wide dependent count for version 1.13.0.

DescriptionGitHub Advisory

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.

AnalysisAI

Denial of service in Axios HTTP/2 client before version 1.13.2 allows unauthenticated remote attackers to crash Node.js applications through malicious HTTP/2 server responses that trigger state corruption during concurrent session closures. The vulnerability exploits a control flow error in session cleanup logic with high attack complexity, making real-world exploitation require specific server-side conditions but posing significant risk to applications relying on HTTP/2.

Technical ContextAI

Axios is a popular promise-based HTTP client library for Node.js and browsers. The vulnerability resides in the Http2Sessions.getSession() method within lib/adapters/http.js, where HTTP/2 session management logic improperly handles removal of sessions from an internal sessions array. The root cause is classified as CWE-400 (Uncontrolled Resource Consumption), indicating a resource management flaw where concurrent session closure operations corrupt internal state. When a malicious HTTP/2 server triggers multiple simultaneous session terminations, the cleanup logic fails to properly synchronize array mutations, leading to use-after-free or index out-of-bounds conditions that crash the Node.js process. This affects all Axios versions before 1.13.2 that support HTTP/2 protocol handling.

RemediationAI

Upgrade Axios to version 1.13.2 or later, which contains the fix for the HTTP/2 session cleanup control flow error. For applications unable to immediately upgrade, disable HTTP/2 protocol support in HTTP client configuration or implement network-level filtering to restrict HTTP/2 connections from untrusted servers. Consult the official GitHub Security Advisory (https://github.com/axios/axios/security/advisories/GHSA-qj83-cq47-w5f8) for additional context and verification of patch deployment. Monitor Node.js process stability and implement crash recovery mechanisms as temporary mitigations.