DEBIAN-CVE-2026-84380
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.
DEBIAN-CVE-2026-84380
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-84380
python-httpx2
Source reference: /affected/0/package/name
- Affected versions
- 2.4.0-1
Source reference:
/affected/0/versions2.5.0-1Source reference:
/affected/0/versions - Fixed versions
- 2.12.0-1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.0-1"
}
]
}
],
"package": {
"name": "python-httpx2",
"purl": "pkg:deb/debian/python-httpx2?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.4.0-1",
"2.5.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84380.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58237 · Revision 1
- Added to Heist Feed
- Publisher date