Medium severity5.3GHSA Advisory· Published Jul 14, 2026· Updated Jul 15, 2026
CVE-2026-49854
CVE-2026-49854
Description
Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, the optional native extension tornado.speedups implemented websocket_mask without validating that the mask argument is exactly four bytes, allowing the C function to read up to three bytes beyond the provided buffer when reached through Tornado XSRF token decoding with the native extension active. This issue is fixed in version 6.5.6.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
tornadoPyPI | < 6.5.6 | 6.5.6 |
Affected products
9- Range: < 6.5.6
- osv-coords8 versionspkg:apk/chainguard/airflow-3pkg:apk/chainguard/litellmpkg:apk/chainguard/tensorflow-cpu-jupyterpkg:apk/chainguard/tensorflow-gpu-jupyterpkg:apk/wolfi/airflow-3pkg:apk/wolfi/tensorflow-cpu-jupyterpkg:rpm/opensuse/python-tornado6&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-tornado6&distro=openSUSE%20Tumbleweed
< 3.2.2-r4+ 7 more
- (no CPE)range: < 3.2.2-r4
- (no CPE)range: < 1.88.1-r2
- (no CPE)range: < 2.21.0-r5
- (no CPE)range: < 2.21.0-r5
- (no CPE)range: < 3.2.2-r4
- (no CPE)range: < 2.21.0-r5
- (no CPE)range: < 6.5-160000.5.1
- (no CPE)range: < 6.5.7-1.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-cx3h-4qpv-8hc9ghsaADVISORY
- github.com/tornadoweb/tornado/releases/tag/v6.5.6nvdWEB
- github.com/tornadoweb/tornado/security/advisories/GHSA-cx3h-4qpv-8hc9nvdWEB
- github.com/tornadoweb/tornado/commit/96dc88c2a05705287856b2cd6b4b4034f9a6aaacnvd
- github.com/tornadoweb/tornado/pull/3626nvd
News mentions
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