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SCA: security update for tornado (GHSA-r4j5-9xpp-3985)

medium Tenable Self-Hosted Container Security Plugin ID 477761

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Tornado is a Python web framework and asynchronous networking library. Prior to 6.6.0, Tornado decodes
 HTTP/1.1 chunked transfer encoding by processing body data that has already arrived without yielding to
 the event loop. A remote unauthenticated peer can send millions of one-byte chunks to monopolize the
 process event loop and stall every other connection served by that process, while lowering max_body_size
 only limits the duration of each request. For handlers that do not use @stream_request_body, retaining
 each chunk as a separate object can consume roughly twenty times the received body size, and
 SimpleAsyncHTTPClient has the same event-loop behavior when reading a response from a malicious server.
 This issue is fixed in version 6.6.0. (CVE-2026-115927)

Solution

Update the tornado library and its related packages to version 6.6 or later.

See Also

https://github.com/advisories/GHSA-r4j5-9xpp-3985

Plugin Details

Severity: Medium

ID: 477761

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/29/2026

Updated: 10/29/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-115927

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/28/2026

Vulnerability Publication Date: 10/26/2026

Reference Information

CVE: CVE-2026-115927