CVE-2026-44479: Vercel Non-interactive Mode Includes CLI Arguments Vulnerability

MODERATE
Advisory Identifier: GHSA-pgf8-2hgj-grqg
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CVSS 5.5
CWE-532 CWE-200
Published
Advisory Summary

CVE-2026-44479 is a MODERATE (CVSS 5.5) non-interactive mode includes cli arguments vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Vercel libraries in the npm ecosystem. The issue involves non-interactive mode includes cli arguments in suggested command output. Remediation is available by upgrading affected packages to version 52.0.1.

CVE-2026-44479 at a Glance

CVE Identifier CVE-2026-44479
GHSA Identifier GHSA-pgf8-2hgj-grqg
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Vercel
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-44479

To remediate this vulnerability, upgrade all affected Vercel dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vercel fixed: 52.0.1 
npm install vercel@52.0.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls vercel

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-44479, inspect your project dependencies using npm:

npm ls vercel

Analyze the terminal output to locate any version of Vercel in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 52.0.1), your application is affected.

Note: The npm ls vercel command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Vercel, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

# Summary When the Vercel CLI runs in non-interactive mode (`--non-interactive` or auto-detected AI agent), commands that cannot complete autonomously emit JSON payloads with suggested follow-up commands. If the user authenticated via `--token` or `-t` on the command line, the token value is included verbatim in those suggestions. # Conditions All three must be true for the token to appear in output: 1. Token passed as a CLI argument (`--token` / `-t`). The `VERCEL_TOKEN` environment variable is **not affected**. 2. Non-interactive mode is active (explicit flag or AI agent auto-detection). 3. The command cannot complete on its own (e.g. missing `--yes`, ambiguous scope, API errors). Successful commands produce no suggestion output. ## Impact The plaintext token may be captured in CI/CD logs, agent transcripts, or other automation output. ## Remediation - Upgrade to the patched version. - If developers have previously used `--token` with `--non-interactive` in their applications, review logs for exposed tokens and rotate them. - Prefer `VERCEL_TOKEN` environment variable for authentication.

CVE-2026-44479 Affected Vercel Versions

1 component(s)
Fixed Versions:
52.0.1
Product / Package Ecosystem Affected Versions Fixed Version
vercel
npm/vercel
npm
≥ 50.16.0
< 52.0.1
52.0.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vercel/vercel/security/advisories/GHSA-pgf8-2hgj-grqg
NVD — CVE-2026-44479 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44479
Vercel Source Repository REPOSITORY
https://github.com/vercel/vercel

Frequently Asked Questions

What is CVE-2026-44479?
CVE-2026-44479 is a security vulnerability in Vercel involving Non-interactive mode includes CLI arguments in suggested command output under CWE-532: Insertion of Sensitive Information into Log File.
Which Vercel versions are affected?
Affected versions include releases prior to 52.0.1 across affected packages: vercel.
What version fixes CVE-2026-44479?
Upgrading to 52.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vercel affected?
Yes, vercel is affected in releases prior to 52.0.1. Upgrade your dependency to 52.0.1 or later.
What is the CVSS score of CVE-2026-44479?
CVE-2026-44479 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-44479?
CVE-2026-44479 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check npm dependencies for CVE-2026-44479?
Run the dependency tree command: 'npm ls vercel'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pgf8-2hgj-grqg",
  "modified" : "2026-05-14T20:32:07Z",
  "published" : "2026-05-07T00:05:20Z",
  "aliases" : [ "CVE-2026-44479" ],
  "summary" : "Vercel: Non-interactive mode includes CLI arguments in suggested command output",
  "details" : "# Summary\n\nWhen the Vercel CLI runs in non-interactive mode (`--non-interactive` or auto-detected AI agent), commands that cannot complete autonomously emit JSON payloads with suggested follow-up commands. If the user authenticated via `--token` or `-t` on the command line, the token value is included verbatim in those suggestions.\n\n# Conditions\n\nAll three must be true for the token to appear in output:\n\n1. Token passed as a CLI argument (`--token` / `-t`). The `VERCEL_TOKEN` environment variable is **not affected**.\n2. Non-interactive mode is active (explicit flag or AI agent auto-detection).\n3. The command cannot complete on its own (e.g. missing `--yes`, ambiguous scope, API errors). Successful commands produce no suggestion output.\n\n## Impact\n\nThe plaintext token may be captured in CI/CD logs, agent transcripts, or other automation output.\n\n## Remediation\n\n- Upgrade to the patched version.\n- If developers have previously used `--token` with `--non-interactive` in their applications, review logs for exposed tokens and rotate them.\n- Prefer `VERCEL_TOKEN` environment variable for authentication.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vercel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "50.16.0"
      }, {
        "fixed" : "52.0.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 52.0.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vercel/vercel/security/advisories/GHSA-pgf8-2hgj-grqg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44479"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vercel/vercel"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-07T00:05:20Z",
    "nvd_published_at" : "2026-05-13T16:16:58Z"
  }
}