CVE-2026-56850
published 2026-07-30CVE-2026-56850: 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…
PriorityP418medium4.4CVSS 3.1
AVLACLPRHUINSUCNIHAN
EPSS
0.08%
0.2th percentile
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**.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| nodejs | node | 22.23.1 – 22.23.1 | — |
| nodejs | node | 24.18.0 – 24.18.0 | — |
| nodejs | node | 26.5.0 – 26.5.0 | — |
| nodejs | node.js | 22.0 – 22.23.1 | — |
| nodejs | node.js | 24.0.0 – 24.18.0 | — |
| nodejs | node.js | 26.0.0 – 26.5.0 | — |
| nodejs_22 | nodejs | — | — |
| nodejs_24 | nodejs | — | — |
CVSS provenance
nvdv3.14.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
nvdv3.04.1MEDIUMCVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
vendor_redhat4.1MEDIUM
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Red Hat
nodejs: Node.js: mTLS client identities can be reused due to HTTPS Agent connection flaw
vendor_redhat·2026-07-30·CVSS 4.1
CVE-2026-56850 [MEDIUM] CWE-303 nodejs: Node.js: mTLS client identities can be reused due to HTTPS Agent connection flaw
nodejs: Node.js: mTLS client identities can be reused due to HTTPS Agent connection flaw
A flaw was found in Node.js. The HTTPS Agent, responsible for managing secure connections, can incorrectly reuse client identities across different requests. This occurs due to a technical issue with PFX object-array key collisions during connection reuse. As a result, a client's identity, established through mutual TLS (mTLS) authentication, could be mistakenly applied to another request, potentially leading to unauthorized access or identity spoofing.
Statement: This Moderate flaw in Node.js allows mutual TLS (mTLS) client identities to be reused across requests due to a connection reuse issue within the HTTPS Agent. This can lead to unintended identity confusion if applications are configured to u
GHSA
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 cer
ghsa_unreviewed·2026-07-30
CVE-2026-56850 [MEDIUM] CWE-287 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 cer
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**.
No detection rules found.
No public exploits indexed.
2026-07-30
Published