Detections
Analytics

Echo: unbound: security update to 1.26.2

high Tenable Self-Hosted Container Security Plugin ID 477100

Description

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

 - NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug
 reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration
 can enter stream/connection cleanup while a mesh reply still retains a pointer to the DoQ stream. Cleanup
 frees the DoQ stream and when the pending mesh reply later completes it dereferences a stale pointer
 leading to a crash. (CVE-2026-97206)

Solution

Update the unbound library and its related packages to version 1.26.2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-97206

Plugin Details

Severity: High

ID: 477100

Version: Revision 1.1

Type: Local

Published: 10/23/2026

Updated: 10/23/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-97206

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/21/2026

Vulnerability Publication Date: 10/21/2026

Reference Information

CVE: CVE-2026-97206