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Tornado is vulnerable to DoS due to too many multipart parts

🗓️ 12 Mar 2026 14:19:52Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 13 Views

Tornado before 6.5.5 is vulnerable to DoS from large multipart bodies; 6.5.5 adds a 100-part limit.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Monitor Component uses tornado-6.5.3-cp39-abi3-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl which is vulnerable to CVE-2026-31958
29 May 202608:42
–ibm
ATTACKERKB		CVE-2026-31958
11 Mar 202619:27
–attackerkb
Tenable Nessus		Amazon Linux 2023 : python3-tornado (ALAS2023-2026-1502)
1 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.13-tornado (ALAS2023-2026-1528)
1 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : python3-tornado, --advisory ALAS2-2026-3213 (ALAS-2026-3213)
1 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : python-tornado, --advisory ALAS2-2026-3214 (ALAS-2026-3214)
1 Apr 202600:00
–nessus
Tenable Nessus		AlmaLinux 10 : python-tornado (ALSA-2026:13641)
6 May 202600:00
–nessus
Tenable Nessus		AlmaLinux 9 : python-tornado (ALSA-2026:13670)
6 May 202600:00
–nessus
Tenable Nessus		AlmaLinux 8 : pcs (ALSA-2026:8093)
16 Apr 202600:00
–nessus
Tenable Nessus		Debian dla-4520 : python-tornado-doc - security update
1 Apr 202600:00
–nessus
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Vulners
Node
tornadotornadoRange≤6.5.4pip

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06 Apr 2026 19:41Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.5
CVSS 48.7
EPSS0.00028
SSVC
CWE-400
denial of servicetornado frameworkmultipart parsingparse multipart configdisable parsingdefault parts limit
13