KEVWire

Security intelligence, with context.

Response snapshot Oct 26, 2026, 23:53 UTC

Back to the wire
Permalink
VulnerabilityCVE-2026-109461

MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint

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. Version 7.1.0 and higher are patched.

At a glance

Exploited
Not known
Severity
7.5 High (CVSS 3.1)
Chance of exploitation
0.4% in the next 30 days
Sources
1 source

What to do

GitHub lists first patched versions: @azure/msal-node: 7.1.0. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-xcx6-jx8p-x3h5 (opens a new tab)

What happened

### 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.

Continue reading

### Workarounds

Ensure you pass in only the auth_code to to acquireTokenByCode

Affected package ranges reported by GitHub: @azure/msal-node: >= 5.0.0-beta.0, < 7.1.0

Scores and how they were measured

CVSS base severity

7.5

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.4%

Scored Percentile 29.7%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-xcx6-jx8p-x3h5 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-xcx6-jx8p-x3h5, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  3. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-109461, scored 2026-10-26. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 23). MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint (CVE-2026-109461). https://kevwire.com/record/CVE-2026-109461

MLA

"MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint (CVE-2026-109461)." KEVWire, 23 Oct. 2026, kevwire.com/record/CVE-2026-109461.

Chicago

KEVWire. "MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint (CVE-2026-109461)." Last modified October 23, 2026. https://kevwire.com/record/CVE-2026-109461.

Evidence summary (plain text)

MSAL Node authorization code flow may disclose parameters to an attacker-controlled endpoint (Oct 23, 2026).
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.

Version 7.1.0 and higher are patched.
CVSS 7.5 (version 3.1; evidence as of Oct 23, 2026; https://github.com/advisories/GHSA-xcx6-jx8p-x3h5).
EPSS 0.4% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-109461&date=2026-10-26).
Sources:
GitHub-reviewed advisory GHSA-xcx6-jx8p-x3h5: https://github.com/advisories/GHSA-xcx6-jx8p-x3h5
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-109461&date=2026-10-26
Record ID: CVE-2026-109461.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 26, 2026, 19:40 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

Your account

Email alerts

Email alerts are not available yet. To follow your stack today, use its RSS feed, which honors your filters, or connect an AI agent through the API.

Suggest an improvement

Ideas, missing sources, corrections, and bugs are all welcome. No account needed. Suggestions are reviewed by a person before anything changes.

Record details

Record detail