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RHEL 9 : python-tornado (RHSA-2026:98107)

high Nessus Plugin ID 378740

Synopsis

The remote Red Hat host is missing one or more security updates for python-tornado.

Description

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:98107 advisory.

 Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

 Security Fix(es):

 * tornado: Tornado: Denial of Service via uncontrolled gzip decompression memory consumption (CVE-2026-49855)

 * python-tornado: Tornado: Denial of Service via excessive URL-encoded body fields (CVE-2026-82397)

 * tornado: Tornado: Denial of Service via memory amplification in multipart parsing (CVE-2026-91990)

 * tornado: Tornado: Denial of Service via decompression bomb in CurlAsyncHTTPClient (CVE-2026-103262)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL python-tornado package based on the guidance in RHSA-2026:98107.

See Also

https://access.redhat.com/errata/RHSA-2026:98107

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2500686

https://bugzilla.redhat.com/show_bug.cgi?id=2526562

https://bugzilla.redhat.com/show_bug.cgi?id=2533953

https://bugzilla.redhat.com/show_bug.cgi?id=2544534

http://www.nessus.org/u?979be492

Plugin Details

Severity: High

ID: 378740

File Name: redhat-RHSA-2026-98107.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/11/2026

Updated: 11/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.76

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-91990

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:redhat:rhel_e4s:9.4, p-cpe:/a:redhat:enterprise_linux:python-tornado, p-cpe:/a:redhat:enterprise_linux:python3-tornado

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/11/2026

Vulnerability Publication Date: 6/15/2026

Reference Information

CVE: CVE-2026-103262, CVE-2026-49855, CVE-2026-82397, CVE-2026-91990

CWE: 1050, 409, 770

RHSA: 2026:98107