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Fencer Intel
high 8.2

CVE-2026-94482 json

Next.js: Denial of Service in App Router using Server Actions

published 26d ago modified 10d ago also EUVD-2026-108214 , GHSA-p3m5-59mp-jv5r

cvss
8.2
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages Router and App Router applications without Server Actions are not affected. This issue is fixed in versions 15.5.28 and 16.4.1.

Patch / fix

  • npm next 15.5.28, 16.4.1
  • vercel next.js 15.5.28, 16.4.1

Is CVE-2026-94482 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-94482 updated cvss 7.5

next: Next.js: Denial of Service via crafted requests targeting Server Actions

  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9 Red Hat Trusted Artifact Signer rhtas/rekor-search-ui-rhel9 Red Hat streams for Apache Kafka 3 amq-streams-sources.zip 3.2.2.CR2
    affected: no fix available
  • Red Hat Enterprise Linux 7 firefox, firefox 140.17.0-1.el10_2 Red Hat Enterprise Linux 8 firefox, thunderbird, firefox 140.17.0-1.el10_2, thunderbird 140.16.0-1.el10_2 Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird, firefox 140.17.0-1.el10_2, thunderbird 140.16.0-1.el10_2 Red Hat Enterprise Linux 10 firefox 140.17.0-1.el10_2, thunderbird 140.16.0-1.el10_2
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
10d ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
npm next
>=13.0.0, <15.5.28
>=16.0.0, <16.4.1
15.5.28
16.4.1

Affected products

  • vercel next.js

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of vercel/next.js published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.