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🐍 PyPI

GHSA-fqwm-6jpj-5wxc

HIGH

GHSA-fqwm-6jpj-5wxc is a high-severity (CVSS 7.2) CWE-159 vulnerability in tornado. O3 Security confirms whether GHSA-fqwm-6jpj-5wxc is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Tornado has cookie attribute injection via .RequestHandler.set_cookie

Also known asCVE-2026-35536GHSA-78cv-mqj4-43f7PYSEC-2026-2287
Published
Apr 3, 2026
Updated
Jul 13, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐍tornado

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

Description

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPItornadoall versions6.5.5

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tornado. 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 tornado to 6.5.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fqwm-6jpj-5wxc 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-fqwm-6jpj-5wxc 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-fqwm-6jpj-5wxc. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to `.RequestHandler.set_cookie` were not checked for crafted characters.
O3 Security · Impact-Aware SCA

Is GHSA-fqwm-6jpj-5wxc in your dependencies?

O3 detects GHSA-fqwm-6jpj-5wxc across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.