GHSA-m99w-x7hq-7vfj

Suggest an improvement
Source
https://github.com/advisories/GHSA-m99w-x7hq-7vfj
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-m99w-x7hq-7vfj/GHSA-m99w-x7hq-7vfj.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-m99w-x7hq-7vfj
Aliases
Downstream
CGA (28)
MINI (4)
Published
2026-07-22T22:59:01Z
Modified
2026-09-10T03:50:52Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Next.js: Denial of Service in App Router using Server Actions
Details

Impact

Crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process.

Workarounds

No workaround exists besides upgrading. Applications using Pages Router or not using Server Actions are not vulnerable.

Database specific 
{
    "cwe_ids":  [
        "CWE-834"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-22T22:59:01Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
References

Affected packages

npm / next

Package

Name
next
View open source insights on deps.dev
Purl
pkg:npm/next

Affected ranges

Type
SEMVER
Events
Introduced
13.0.0
Fixed
15.5.21

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-m99w-x7hq-7vfj/GHSA-m99w-x7hq-7vfj.json"

npm / next

Package

Name
next
View open source insights on deps.dev
Purl
pkg:npm/next

Affected ranges

Type
SEMVER
Events
Introduced
16.0.0
Fixed
16.2.11

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-m99w-x7hq-7vfj/GHSA-m99w-x7hq-7vfj.json"