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TI-2026-80680 Aliases CVE-2026-116578GHSA-pw9p-v7r6-gx4p

Open redirect in Tornado RedirectHandler via crafted request paths

Priority LOW 12CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
Spoofing
Confidentiality · integrity · availability
None · None · None
Fix status
Partial Red Hat: 11 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-601.

Summary

Tornado before 6.6 contains an open redirect in tornado.web.RedirectHandler, where URL templates that place regex capture substitutions at the start of a path or directly after a fixed host let crafted request paths change the redirect scheme or host (CWE-601). An unauthenticated remote attacker can use crafted requests to redirect users from the application's domain to an attacker-controlled site, which enables phishing.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00459 39th percentileScored 2026-11-07
Fix Partial tornado (tornadoweb): 6.6tornado (PyPI): 6.6Red Hat: 11 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tornadowebtornadobefore 6.66.6Patch availableCNA
—tornado (PyPI)before 6.66.6Patch availableGHSA-pw9p-v7r6-gx4p
  • tornado Vendortornadoweb Affected before 6.6 Fixed in 6.6 Patch available CNA
  • tornado (PyPI) Vendor— Affected before 6.6 Fixed in 6.6 Patch available GHSA-pw9p-v7r6-gx4p

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*——tornadoweb
  • cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* Versions — — ·tornadoweb

Remediation

Upgrade the PyPI package tornado to version 6.6, which fixes this issue. Red Hat lists Lightspeed Core, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 8, 9 and 10, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4 and 5 as affected with no fix available, and Red Hat OpenStack Platform 16.2 with no fix planned.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA tornado (tornadoweb) Fixed in 6.6
  • Fix · GHSA-pw9p-v7r6-gx4p tornado (PyPI) Fixed in 6.6 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Lightspeed CoreAffectedNo fix yet: Fix deferred
OpenShift LightspeedAffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Red Hat OpenStack Platform 16.2AffectedNo fix planned: Out of support scope

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116578
  2. 2026-10-27 Affected versions changed · Red Hat
  3. 2026-10-27 CVSS score added · Red Hat
  4. 2026-10-28 Alias added: GHSA-pw9p-v7r6-gx4p
  5. 2026-10-28 Fix available: PyPI/[email protected] · GHSA-pw9p-v7r6-gx4p
  6. 2026-10-28 CVSS score added · GHSA-pw9p-v7r6-gx4p
  7. 2026-10-28 Weakness changed · GHSA-pw9p-v7r6-gx4p
  8. 2026-10-28 8 new references · GHSA-pw9p-v7r6-gx4p
  9. 2026-10-30 Affected versions changed · Red Hat
  10. 2026-10-30 CISA SSVC decision points changed

References

Advisory 1

Other 7

  • TI-2026-65637 Tornado before 6.5.9 Denial of Service via CurlAsyncHTTPClient CVSS 4.0HIGH 8.7
  • TI-2026-62120 Tornado before 6.5.8 Memory Amplification DoS via multipart CVSS 4.0HIGH 8.7
  • TI-2024-13023 Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding CVSS 4.0CRITICAL 9.0
  • TI-2026-65638 Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink CVSS 4.0HIGH 8.2
  • TI-2026-62122 Tornado before 6.5.7 Credential Leak via Handle Reuse CVSS 4.0HIGH 8.2
  • TI-2026-62121 Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs CVSS 4.0MEDIUM 6.3
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences