OESA-2026-1018

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-1018
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-1018.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2026-1018
Upstream
Published
2026-01-09T14:05:52Z
Modified
2026-01-09T14:29:56.165010Z
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. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.(CVE-2025-67726)

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

Affected packages

openEuler:24.03-LTS-SP3 / python-tornado

Package

Name
python-tornado
Purl
pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.5-2.oe2403sp3

Ecosystem specific 

{
    "src": [
        "python-tornado-6.5-2.oe2403sp3.src.rpm"
    ],
    "x86_64": [
        "python-tornado-debuginfo-6.5-2.oe2403sp3.x86_64.rpm",
        "python-tornado-debugsource-6.5-2.oe2403sp3.x86_64.rpm",
        "python-tornado-help-6.5-2.oe2403sp3.x86_64.rpm",
        "python3-tornado-6.5-2.oe2403sp3.x86_64.rpm"
    ],
    "aarch64": [
        "python-tornado-debuginfo-6.5-2.oe2403sp3.aarch64.rpm",
        "python-tornado-debugsource-6.5-2.oe2403sp3.aarch64.rpm",
        "python-tornado-help-6.5-2.oe2403sp3.aarch64.rpm",
        "python3-tornado-6.5-2.oe2403sp3.aarch64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-1018.json"