CVE-2026-44479

Token disclosure via unredacted follow-up commands

Published May 13, 2026 · Updated May 13, 2026

Sensitive-data exposure in Vercel CLI 50.16.0 through 52.0.0 allows attackers to obtain plaintext tokens from automation output. The non-interactive command-suggestion path serializes the original --token or -t argument verbatim into JSON follow-up commands instead of redacting it. Exposure requires command-line token authentication, non-interactive mode, and a command that cannot complete; attackers must also access the resulting logs or transcripts, while successful commands and VERCEL_TOKEN are unaffected.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-data exposure in Vercel CLI 50.16.0 through 52.0.0 allows attackers to obtain plaintext tokens from automation output. The non-interactive command-suggestion path serializes the original --token or -t argument verbatim into JSON follow-up commands instead of redacting it. Exposure requires command-line token authentication, non-interactive mode, and a command that cannot complete; attackers must also access the resulting logs or transcripts, while successful commands and VERCEL_TOKEN are unaffected.

The record

CVE
CVE-2026-44479
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Vercel
Product
Vercel CLI
Classifications
CWE-532, CWE-200, T1552.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 50.16.0, < 52.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vercel · Vercel CLIversion=>= 50.16.0, < 52.0.1

Published CVSS scores

5.5GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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