CVE-2026-94484Network attack vectorHinoki check available

Cross-user content substitution via shared cache-key collision

Published Oct 2, 2026 · Updated Oct 2, 2026

Cache poisoning in Vercel Next.js 15.0.0 through 15.5.26 and 16.0.0 through 16.3.7 lets remote attackers disrupt SSG/ISR pages. With a root-level catch-all page, a crafted request populates a shared response-cache key that fails to distinguish the source route, serving substituted content to later visitors. Exposure requires the catch-all page and statically generated or ISR routes; the poisoned entry can interrupt service until it is revalidated or replaced.

CVSS severity6.3
Medium
EPSS probability0.24%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cache poisoning in Vercel Next.js 15.0.0 through 15.5.26 and 16.0.0 through 16.3.7 lets remote attackers disrupt SSG/ISR pages. With a root-level catch-all page, a crafted request populates a shared response-cache key that fails to distinguish the source route, serving substituted content to later visitors. Exposure requires the catch-all page and statically generated or ISR routes; the poisoned entry can interrupt service until it is revalidated or replaced.

The record

CVE
CVE-2026-94484
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
Vercel
Product
Next.js
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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=>= 15.0.0, < 15.5.27
  2. Affected versionversion=>= 16.0.0, < 16.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vercel · Next.jsversion=>= 15.0.0, < 15.5.27; version=>= 16.0.0, < 16.3.8

Published CVSS scores

6.3VercelCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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