Detections
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Echo: urllib3: security update to 2.8.0

medium Tenable Self-Hosted Container Security Plugin ID 462030

Description

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

 - urllib3 is an HTTP client library for Python. From 2.6.2 until 2.8.0, HTTPResponse.stream and
 HTTPResponse.read_chunked can enter an infinite loop because the Deflate decoder retains trailing bytes as
 unconsumed input after reaching end-of-stream and repeatedly decodes them without progress. The issue
 occurs when an untrusted server sends a chunked Deflate response whose decoded body exceeds a positive
 finite chunk size and whose encoded body has trailing bytes, specifically a response with Transfer-
 Encoding: chunked and Content-Encoding: deflate, content decoding enabled, and the positive finite amt=N
 streaming chunk size. The attack mechanism is that a malicious server returns a compressed chunked
 response with trailing bytes after the Deflate stream. The impact is excessive CPU usage and a request
 that does not complete, and network read timeouts do not interrupt the loop because no further socket read
 occurs. This issue is fixed in version 2.8.0. (CVE-2026-97688)

Solution

Update the urllib3 library and its related packages to version 2.8.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-97688

Plugin Details

Severity: Medium

ID: 462030

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-97688

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/1/2026

Vulnerability Publication Date: 9/29/2026

Reference Information

CVE: CVE-2026-97688