CVE-2026-56850: CWE-287 Improper Authentication - Generic in nodejs node
A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
AI Analysis
Technical Summary
CVE-2026-56850 is a vulnerability in Node.js HTTPS Agent connection reuse mechanism where PFX object-array key collisions occur. This flaw allows mutual TLS (mTLS) client identities to be reused across different requests that are configured with distinct client certificates. The vulnerability affects Node.js versions 26.5.0, 24.18.0, and 22.23.1. It is categorized under CWE-287 (Improper Authentication). The CVSS 3.0 base score is 4.1 with vector AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N, indicating a medium severity issue requiring high privileges and local access to exploit.
Potential Impact
The vulnerability can lead to improper authentication by allowing mTLS client identities to be reused across requests with different client certificates. This could result in unauthorized actions being performed under a reused client identity. There is no impact on confidentiality or availability according to the CVSS vector. Exploitation requires local access with high privileges and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor Node.js vendor advisories for updates addressing this issue before deploying affected versions in sensitive environments.
CVE-2026-56850: CWE-287 Improper Authentication - Generic in nodejs node
Description
A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
CVSS v3.0
Score 4.1medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56850 is a vulnerability in Node.js HTTPS Agent connection reuse mechanism where PFX object-array key collisions occur. This flaw allows mutual TLS (mTLS) client identities to be reused across different requests that are configured with distinct client certificates. The vulnerability affects Node.js versions 26.5.0, 24.18.0, and 22.23.1. It is categorized under CWE-287 (Improper Authentication). The CVSS 3.0 base score is 4.1 with vector AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N, indicating a medium severity issue requiring high privileges and local access to exploit.
Potential Impact
The vulnerability can lead to improper authentication by allowing mTLS client identities to be reused across requests with different client certificates. This could result in unauthorized actions being performed under a reused client identity. There is no impact on confidentiality or availability according to the CVSS vector. Exploitation requires local access with high privileges and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor Node.js vendor advisories for updates addressing this issue before deploying affected versions in sensitive environments.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-06-23T15:00:03.632Z
- Cvss Version
- 3.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6aee0c9c2644c7f8a7f05b
Added to database: 07/30/2026, 06:24:12 UTC
Last enriched: 07/30/2026, 06:39:20 UTC
Last updated: 07/31/2026, 02:51:53 UTC
Views: 11
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