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Echo: httpx2: security update to 2.11.0

medium Tenable Self-Hosted Container Security Plugin ID 472274

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-84380)

Solution

Update the httpx2 library and its related packages to version 2.11.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-84380

Plugin Details

Severity: Medium

ID: 472274

Version: Revision 1.1

Type: Local

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.8

Percentile: 22.29

CVSS v2

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-84380

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/3/2026

Vulnerability Publication Date: 9/2/2026

Reference Information

CVE: CVE-2026-84380