CVE-2026-109461: Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability

CVE-2026-109461 PUBLISHED CVSS 5.9 MEDIUM

Microsoft Authentication Library (MSAL) for Node.js Information Disclosure Vulnerability

Reported by microsoft · Published October 16, 2026

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

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
dbgate-fips	Chainguard	7.3.2-r3
dbgate	Chainguard	7.3.3-r1
saf	Chainguard	1.7.0-r5
redisinsight	Chainguard	3.8.0-r14
azurite	Chainguard	3.37.0-r9
saf	Wolfi	1.7.0-r5
Microsoft Identity Client for NodeJS	Microsoft	7.1.0

Risk scores

CVSS 3.1

5.9

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Affected products

Vendor	Product	Versions
Microsoft	Microsoft Identity Client for NodeJS	5.0.0
chainguard	dbgate-fips	0
chainguard	dbgate	0
chainguard	saf	0
chainguard	redisinsight	0
chainguard	azurite	0
wolfi	saf	0
Microsoft	Microsoft Identity Client for NodeJS	5.0.0
microsoft	microsoft_identity_client_for_nodejs	5.0.0
azure	msal-node	5.0.0-beta.0

Timeline

Oct 16, 2026 Coalition ESS Score
Oct 16, 2026 CVE Published
Oct 17, 2026 EPSS Score (7 in total, the first dated here)
Oct 18, 2026 CVE Updated
Oct 30, 2026 Security Advisory (2 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-109461
vulnetix vdb fixes CVE-2026-109461

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-109461/fixes/registry"

The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart

References

Look up in the Resolve Platform →