OESA-2026-3973

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3973
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3973.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-3973
Upstream
Published
2026-09-20T13:23:43Z
Modified
2026-09-20T13:30:29Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
python-tornado security update
Details

Tornado is an open source version of the scalable, non-blocking web server and tools.

Security Fix(es):

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with urllib.parse.parse_qs in tornado/escape.py without passing max_num_fields. RequestHandler._execute in tornado/web.py parses the body before handler dispatch through HTTPServerRequest._parse_body and parse_body_arguments in tornado/httputil.py, so an unauthenticated request body containing millions of separator-delimited fields can synchronously stall the single-threaded event loop and delay every connection. The body is bounded only by max_buffer_size, which defaults to 104857600 bytes. This issue is fixed in version 6.5.8.(CVE-2026-82397)

Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:24.03-LTS-SP1 / python-tornado

Package

Name
python-tornado
Purl
pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.5-6.oe2403sp1

Ecosystem specific 

{
    "aarch64":  [
        "python-tornado-debuginfo-6.5-6.oe2403sp1.aarch64.rpm",
        "python-tornado-debugsource-6.5-6.oe2403sp1.aarch64.rpm",
        "python-tornado-help-6.5-6.oe2403sp1.aarch64.rpm",
        "python3-tornado-6.5-6.oe2403sp1.aarch64.rpm"
    ],
    "src":  [
        "python-tornado-6.5-6.oe2403sp1.src.rpm"
    ],
    "x86_64":  [
        "python-tornado-debuginfo-6.5-6.oe2403sp1.x86_64.rpm",
        "python-tornado-debugsource-6.5-6.oe2403sp1.x86_64.rpm",
        "python-tornado-help-6.5-6.oe2403sp1.x86_64.rpm",
        "python3-tornado-6.5-6.oe2403sp1.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3973.json"