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CVE-2026-44479 vercel CVE debrief

A medium-severity vulnerability, CVE-2026-44479, was discovered in Vercel's AI Cloud platform. The issue affects versions 50.16.0 to 52.0.0 of the Vercel CLI. When running in non-interactive mode, 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. This could lead to the plaintext token being captured in CI/CD logs, agent transcripts, or other automation output.

Vendor
vercel
Product
Unknown
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-13
Original CVE updated
2026-06-04
Advisory published
2026-05-13
Advisory updated
2026-06-04

Who should care

Users of Vercel's AI Cloud platform, particularly those who use the Vercel CLI in non-interactive mode or automated environments, should be aware of this vulnerability. Developers and administrators who handle sensitive authentication tokens are at risk if they use affected versions of the Vercel CLI.

Technical summary

The vulnerability exists in the Vercel CLI versions 50.16.0 to 52.0.0. When the CLI runs in non-interactive mode and encounters a command that cannot complete autonomously, it emits JSON payloads with suggested follow-up commands. If the user has authenticated using the --token or -t option, the token is included in these suggestions. The CVSS score for this vulnerability is 5.5, indicating a medium severity level.

Defensive priority

Medium

Recommended defensive actions

  • Upgrade to version 52.0.1 or later of the Vercel CLI to fix the vulnerability.
  • Avoid using --token or -t options in non-interactive modes or automated environments.
  • Review CI/CD logs, agent transcripts, and automation output for potential token exposure.

Evidence notes

The vulnerability was reported via a security advisory on GitHub (resourceLinkAnnotations: ref-4).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44479 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44479

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44479 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44479

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.