UBUNTU-CVE-2026-84380

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Source
https://ubuntu.com/security/CVE-2026-84380
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84380.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-84380
Upstream
Published
2026-09-02T18:21:00Z
Modified
2026-10-17T13:01:13Z
Severity
  • 5.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

HTTPX2 is a next generation HTTP client for Python. Prior to 2.11.0, Request._prepare() in src/httpx2/httpx2/_models.py can add a body-derived Content-Length header to a request that already contains a caller-supplied Transfer-Encoding header because its setdefault() processing checks each default header independently rather than treating the two framing headers as mutually exclusive. Fixed-size byte, JSON, form, and known-length multipart bodies can therefore be serialized over HTTP/1.1 with both headers, allowing request smuggling or connection desynchronization when downstream intermediaries disagree about which framing header takes precedence. This issue is fixed in version 2.11.0.

References

Affected packages

Ubuntu:26.10 / python-httpx2

Package

Name
python-httpx2
Purl
pkg:deb/ubuntu/python-httpx2?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.5.0-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-httpcore2",
            "binary_version":  "2.5.0-1"
        },
        {
            "binary_name":  "python3-httpx2",
            "binary_version":  "2.5.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84380.json"