PT-2026-38406 · Npm · Vercel

Published

2026-05-07

·

Updated

2026-05-07

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CVE-2026-44479

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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.

Fix

Information Disclosure

Insertion into Log File

Weakness Enumeration

CWE-200CWE-532

Related Identifiers

CVE-2026-44479
GHSA-PGF8-2HGJ-GRQG

Affected Products

Vercel