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Echo: unbound: security update to 1.25.2-1

medium Tenable Self-Hosted Container Security Plugin ID 461732

Description

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

 - In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high
 concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and
 result in server termination and thus denial of service. When interfacing with libngtcp2, for DNS-over-
 QUIC support in Unbound, it is expected to use monotonic time. Unbound was using realtime instead, and in
 DoQ environments with high concurrency and under pressure, an assert in libngtcp2 for the quic timestamp
 would trigger and terminate the server.This vulnerability needs Unbound to be compiled with DoQ support ('
 --with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces. (CVE-2026-14586)

Solution

Update the unbound library and its related packages to version 1.25.2-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-14586

Plugin Details

Severity: Medium

ID: 461732

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2026-14586

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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-2026-14586