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SCA: security update for tornado (GHSA-pcg2-g6cj-q92c)

medium Tenable Cloud Security Plugin ID 477763

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, Tornado's HTTP header
 parser accepts obsolete line folding and repeatedly concatenates short continuation lines, causing
 quadratic CPU consumption on the IOLoop thread. An unauthenticated client can submit a header block
 containing many obsolete line-folding continuations before application code runs, blocking other
 connections served by the process. The cost grows with max_header_size, and only availability is affected.
 This issue is fixed in version 6.6. (CVE-2026-116577)

Solution

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

See Also

https://github.com/advisories/GHSA-pcg2-g6cj-q92c

Plugin Details

Severity: Medium

ID: 477763

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/29/2026

Updated: 10/29/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4

Percentile: 53.51

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-2026-116577

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-2026-116577