CVE-2026-75604Public exploitNetwork attack vectorHinoki check available

Unauthenticated code execution via cache path traversal

Published Sep 1, 2026 · Updated Sep 3, 2026

Path traversal in Vercel Next.js 13.4.0 through 15.5.23 and 16.0.0 through 16.3.2 allows remote attackers to execute code. The route-segment escaping helper omits literal backslashes, and the incremental filesystem cache joins attacker-controlled segments without verifying that the result remains beneath its cache root. Affected deployments use a Windows filesystem and the Pages Router or App Router without Cache Components; traversal can disclose the server-reference-manifest encryption key used to enable code execution.

CVSS severity9.0
Critical
EPSS probability2.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Vercel Next.js 13.4.0 through 15.5.23 and 16.0.0 through 16.3.2 allows remote attackers to execute code. The route-segment escaping helper omits literal backslashes, and the incremental filesystem cache joins attacker-controlled segments without verifying that the result remains beneath its cache root. Affected deployments use a Windows filesystem and the Pages Router or App Router without Cache Components; traversal can disclose the server-reference-manifest encryption key used to enable code execution.

The record

CVE
CVE-2026-75604
Published
Sep 1, 2026
Updated
Sep 3, 2026
Vendor
Vercel
Product
Next.js
Classifications
CWE-22, CAPEC-126, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 13.4.0, < 15.5.24
  2. Affected versionversion=>= 16.0.0, < 16.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vercel · Next.jsversion=>= 13.4.0, < 15.5.24; version=>= 16.0.0, < 16.3.3

Published CVSS scores

9.0GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal
T1190Exploit Public-Facing Application
T1005Data from Local System

Public exploit references

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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