Chainguard: firefox-esr-140: security update to 140.17.0-r2

critical Tenable Cloud Security Plugin ID 476321

Description

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

- Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the
Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and
Thunderbird 153.5. (CVE-2026-109705)

Solution

Update the firefox-esr-140 library and its related packages to version 140.17.0-r2 or later.

Plugin Details

Severity: Critical

ID: 476321

Version: Revision 1.1

Type: Local

Family: Chainguard Local Security Checks

Published: 10/20/2026

Updated: 10/20/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.02

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-109705

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-109705

Detections

Analytics