CVE-2026-109461

mediumpriority · track · 24EPSS 0.003 · 27 %ileFRUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.35% (27th) EPSS
CVSS 5.9 · medium
Is it mine?
3 products
Check your exposure
Who says so?
3 sources
msrc_csaf · osv · certfr

EPSS · scored 2026-10-23

Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.4–7.5

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · secure@microsoft.com USexploitability 2.2 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV
v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-346USCWE-346USCWE-346USCWE-346US
05

affected products (3)

Products and version ranges known to be affected.

06

advisories (3)

Vendor and ecosystem advisories describing this.

  • msrc_CVE-2026-109461Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability2026-10-15csaf · msrc_csafUS

    To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

  • GHSA-xcx6-jx8p-x3h5MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint2026-10-23ghsa · osvUS

    ### Impact Origin validation error in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to disclose information over a network. This affects the auth_code flow. ### Patches Version 7.1.0 and higher are patched. ### Workarounds Ensure you pass in only the auth_code to to acquireTokenByCode

  • CERTFR-2026-AVI-1332Multiples vulnérabilités dans les produits MicrosoftFrançais2026-10-16vendor · certfrFR
07

sources

Which sources assert this record, and when.

msrc_csafosvcertfrNVDCVE.orgMITRE
published 2026-10-16modified 2026-10-18
08

references (1) nvd

External citations — patches, advisories, analysis.

scry

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