6.3

CVE-2026-94485: vercel next.js Origin Validation Error

CVSS: 6.3v4.0MediumAnalyzed
AliasesGHSA-f87g-xv8r-7p7xCGA-2mcj-48jj-5h9hCGA-458v-3hw5-88q8
Published 02-10-2026Last modified 02-10-2026
Open JSON

Vulnerability summary

CVE-2026-94485 is a medium (CVSS 6.3) Origin Validation Error vulnerability in vercel next.js. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-10-2026
    PublishedVulnerability first disclosed.
  2. 02-10-2026
    Last modifiedVulnerability information updated.

Description

Next.js is a React framework for building full-stack web applications. From 16.0.0 until 16.3.8, the `next dev` development server exposes a Model Context Protocol endpoint without reliably restricting cross-site requests. A malicious website visited by a developer can reach the endpoint and read the project's disk location, source code snippets from error reports, route inventory, and development logs. Production deployments do not serve this endpoint. This issue is fixed in version 16.3.8.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

03-10-202620-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • commercial-chainloop-frontendAll versions (No fix recorded)
  • langfuse-fips-4All versions (No fix recorded) | < 4.49.0-r7
  • langfuse-fips-4-workerAll versions (No fix recorded) | < 4.49.0-r7
  • zitadel-4-login< 4.19.4-r3
Npm1 product
  • next≥ 16.0.0, < 16.3.8
Vercel1 product

3 vendors · 6 products

References

6 links