OESA-2026-4503

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4503
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4503.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4503
Upstream
Published
2026-10-22T14:35:54Z
Modified
2026-10-22T14:45:11Z
Severity
  • 8.9 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
python-urllib3 security update
Details

Sanity-friendly HTTP client for Python

Security Fix(es):

urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.(CVE-2026-97689)

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

Affected packages

openEuler:24.03-LTS-SP4 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:rpm/openEuler/python-urllib3&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.26.18-10.oe2403sp4

Ecosystem specific 

{
    "noarch":  [
        "python3-urllib3-1.26.18-10.oe2403sp4.noarch.rpm"
    ],
    "src":  [
        "python-urllib3-1.26.18-10.oe2403sp4.src.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4503.json"