CVE-2026-84003CWE-294

CVE-2026-84003

High · published September 8, 2026

CVSS v3.1
7.4
EPSS
1%
Percentile
48.0
In the wild
Unconfirmed
What it is

Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00599 · 48.0th percentile
Weakness
CWE-294 · Authentication Bypass by Capture-replay
Published
2026-09-08T22:21Z
Affected products (1)
ProductVersionsFixed in
microsoft/azure\/msal-node< 5.6.05.6.0
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84003 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 17:19Z
    Microsoft Authentication Library (MSAL) for Node.js Spoofing Vulnerability
    cvelistv5