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{"bugzilla": {"description": "tornado: Tornado: Information disclosure via out-of-bounds read in websocket_mask", "id": "2500661", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500661"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in Tornado, a Python web framework. The optional native extension `tornado.speedups` did not properly validate the `mask` argument in its `websocket_mask` function. This allowed the C function to read beyond the intended buffer, potentially exposing up to three bytes of uninitialized memory. 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"cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-07-14T20:43:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-49854\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-49854\nhttps://github.com/tornadoweb/tornado/commit/96dc88c2a05705287856b2cd6b4b4034f9a6aaac\nhttps://github.com/tornadoweb/tornado/pull/3626\nhttps://github.com/tornadoweb/tornado/releases/tag/v6.5.6\nhttps://github.com/tornadoweb/tornado/security/advisories/GHSA-cx3h-4qpv-8hc9"], "statement": "This Moderate vulnerability in the Tornado web framework's optional native extension, `tornado.speedups`, could lead to information disclosure. When the native extension is active and the XSRF token decoder is in use, an out-of-bounds read of up to three bytes of uninitialized memory may occur. This limited data exposure is contingent on specific configurations and does not directly lead to broader system compromise.", "threat_severity": "Moderate"}

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