Medium [CVE-2026-56850] mTLS client identities can be reused due to HTTPS Agent connection flaw
This medium-severity Red Hat Linux advisory covers CVE-2026-56850 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Get an email when Red Hat Linux RHEL & SELinux publishes the next one.
See Red Hat Linux RHEL & SELinux's last 90 days of advisories first. Then choose the free weekly digest, or a free month of real-time alerts with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
Summary
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**.
A flaw was found in Node.js. The HTTPS Agent, responsible for managing secure connections, can incorrectly reuse client identities across different requests.
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.
This can lead to unintended identity confusion if applications are configured to use different client certificates with reused connections, potentially enabling unauthorized access within the mTLS context. Red Hat severity: Moderate — CVSS 4.1 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N).
Weakness: CWE-303. Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Will not fix / out of support: Red Hat Hardened Images. Red Hat fixing advisory: RHSA-2026:48273, RHSA-2026:48305, RHSA-2026:48537.
Affected products named by the advisory: Red Hat package: nodejs22; Red Hat package: nodejs24.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
- nodejs26-main-26.5.1-1.5.hum1
- nodejs22-main-22.23.2-2.3.hum1
- nodejs24-main-24.18.1-0.1.hum1
- RHSA-2026:48273
- RHSA-2026:48305
- RHSA-2026:48537
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
More Red Hat Linux advisories
- CVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli Decoder
- CVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-free
- CVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCE
- CVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging paths
- CVE-2026-97229Oct 13, 2026integer overflow issue in CI/CD regular expression compiler
- CVE-2026-64849Aug 17, 2026Unauthenticated full-read SSRF in webhook delivery: _validate_webhook_url bypassed
iPhone and Android apps · New on the App Store
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.