CVE-2026-109708

CRITICAL
INFO Priority: 0.03 BB Relevance: 69/100
Published: 2026-10-13 Modified: 2026-10-27 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Changed
C: High
I: High
A: High

Description

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.

Weakness Classification (1)

Bug Bounty Relevance

69 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

9.6 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS — Exploitation Probability

0.33%
Raw Score 0.003340
Percentile 26.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00334
2026-10-28
0.00334

Intelligence Sources

mitre ref →
nvd ref →