Detections
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Echo: undici: security update to 6.28.1

low Tenable Self-Hosted Container Security Plugin ID 472824

Description

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

 - undici's retry interceptor can append the body of a ranged retry response to bytes already delivered from
 an earlier partial response while still presenting the original response's status and headers. This
 happens when an upstream server delivers part of a body without a trustworthy resume checkpoint, for
 example a non-success response whose headers were already sent or a partial-content response with an
 unusable content range, then closes the connection and answers the resumed range request with more bytes.
 As a result the response body can be longer than the Content-Length that the application observes. An
 application that relays such a response to a downstream HTTP/1.1 peer without normalizing the framing can
 emit a body that exceeds the forwarded Content-Length, and the excess bytes can be interpreted as the
 start of a following response, which enables downstream response splitting or desynchronization.
 Exploitation requires an attacker-controlled upstream server and an application that forwards the response
 through a framing-sensitive path. This affects undici versions before 6.28.1, from 7.0.0 up to 7.29.1, and
 from 8.0.0 up to 8.10.2. Users should upgrade to undici 6.28.1, 7.29.1, or 8.10.2. (CVE-2026-18540)

Solution

Update the undici library and its related packages to version 6.28.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-18540

Plugin Details

Severity: Low

ID: 472824

Version: Revision 1.1

Type: Local

Published: 10/5/2026

Updated: 10/13/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

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

CVSS Score Source: CVE-2026-18540

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/5/2026

Vulnerability Publication Date: 9/4/2026

Reference Information

CVE: CVE-2026-18540

IAVB: 2026-B-0283