Advisory severityHigh7.5Vendor: CriticalRed Hat Linux

High [CVE-2023-54397] Tornado before 6.3.3 HTTP Request Smuggling via Content-Length

This high-severity Red Hat Linux advisory covers CVE-2023-54397; related products: Red Hat Enterprise Linux 7, Red Hat package: python-tornado.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2023-54397 Source published Sep 15, 2026Source updated Sep 15, 2026

VulniPulse record published Sep 30, 2026Record updated Sep 30, 2026

CVE-2023-54397

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Summary

Tornado before 6.3.3 HTTP Request Smuggling via Content-Length. Red Hat rates this critical (CVSS 7.5).

Weakness: CWE-444.

Affected products named by the advisory: Red Hat Enterprise Linux 7; Red Hat package: python-tornado.

Affected versions

< 6.3.3

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Configure upstream reverse proxies or load balancers to strictly normalize or sanitize HTTP headers and reject malformed Content-Length headers before requests reach the Tornado application layer.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Discussion(0)

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