Vulnerability GHSA-p3m5-59mp-jv5r

High Risk
HIGH RISK
CVSS Score: 8.0
Score Range: 7.0–8.9
High severity vulnerabilities (CVSS 7.0–8.9). Serious vulnerabilities that should be prioritized soon after critical fixes.
12 days ago
October 22, 2026 at 03:50 PM UTC
Next.js: Denial of Service in App Router using Server Actions
13.0.0 - 15.5.27 and 16.0.0 - 16.4.0
13.0.0 - 15.5.27 and 16.0.0 - 16.4.0

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.

Impacted packages

Timeline

Published
12 days ago
October 22, 2026 at 03:50 PM UTC
Fixed (15.5.28)
20 days ago
October 14, 2026 at 05:36 PM UTC
Fixed (16.4.1)
Unknown
Unknown
Last Modified
12 days ago
October 22, 2026 at 04:00 PM UTC