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📦 npm

GHSA-88qp-p4qg-rqm6

CPU exhaustion in SvelteKit remote form deserialization (experimental only)

Published
Feb 19, 2026
Updated
Feb 22, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
📦@sveltejs/kit

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

Description

Versions of @sveltejs/kit prior to 2.52.2 with remote functions enabled are vulnerable to CPU exhaustion. Malformed form data can cause the server to become unresponsive while processing a request, resulting in denial of service.

Only applications using both experimental.remoteFunctions and form are vulnerable.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npm@sveltejs/kit2.49.0&&< 2.52.22.52.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @sveltejs/kit. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update @sveltejs/kit to 2.52.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-88qp-p4qg-rqm6 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-88qp-p4qg-rqm6 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-88qp-p4qg-rqm6. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Versions of `@sveltejs/kit` prior to 2.52.2 with remote functions enabled are vulnerable to CPU exhaustion. Malformed form data can cause the server to become unresponsive while processing a request, resulting in denial of service. Only applications using both `experimental.remoteFunctions` and `form` are vulnerable.
O3 Security · Impact-Aware SCA

Is GHSA-88qp-p4qg-rqm6 in your dependencies?

O3 detects GHSA-88qp-p4qg-rqm6 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.