Dashboard / CVE-2026-16396

CVE-2026-16396

HIGH
MEDIUM Priority: 0.04 BB Relevance: 68/100
Published: 2026-07-21 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
mozilla firefox < 140.13.0
mozilla firefox < 153.0.0
mozilla thunderbird < 140.13.0

References & Advisories (5)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.45%
Raw Score 0.004520
Percentile 39.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00452
2026-10-28
0.00452

Intelligence Sources

nvd ref →

External Links