UBUNTU-CVE-2026-84381

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Source
https://ubuntu.com/security/CVE-2026-84381
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84381.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-84381
Upstream
Published
2026-09-02T19:18:00Z
Modified
2026-10-17T13:01:12Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

HTTPX2 is a next generation HTTP client for Python. Prior to 2.10.0, httpcore2 fails to start TLS in src/httpcore2/httpcore2/_sync/socks_proxy.py and src/httpcore2/httpcore2/_async/socks_proxy.py when the remote origin uses wss through a SOCKS5 proxy because the TLS upgrade condition only recognizes https. HTTPX2 exposes the flaw through Client.websocket() and AsyncClient.websocket() from 2.6.0 through 2.9.1, so the opening handshake, query parameters, Authorization headers, cookies, and subsequent frames can cross the proxy path in plaintext without certificate verification. An attacker controlling or observing that path can read or modify traffic and impersonate the WebSocket server. This issue is fixed in httpcore2 2.10.0 and HTTPX2 2.10.0.

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-2026-84381.json"