Detections
Analytics

Echo: unbound: security update to 1.25.2

low Tenable Self-Hosted Container Security Plugin ID 465288

Description

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

 - In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port'
 interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire
 address instead of the PROXYv2-declared client. One server cookie obtained through a given proxy node
 therefore validates for every PROXYv2-declared source behind that node. On a UDP+proxy-protocol front, an
 off-path attacker can harvest one cookie with a single legitimate query, then replay it under any spoofed
 source and pass DNS Cookie checks that were deployed to defeat this in the first place. (CVE-2026-54478)

Solution

Update the unbound library and its related packages to version 1.25.2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-54478

Plugin Details

Severity: Low

ID: 465288

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

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-2026-54478

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: 7/23/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-54478