Dashboard / CVE-2026-16387

CVE-2026-16387

CRITICAL
INFO Priority: 0.03 BB Relevance: 80/100
Published: 2026-07-21 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Weakness Classification (3)

Affected Software (4)

VendorProductVersion
mozilla firefox < 140.13.0
mozilla firefox < 153.0.0
mozilla thunderbird < 140.13.0
mozilla thunderbird 141.0 – 153.0

References & Advisories (5)

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.28%
Raw Score 0.002840
Percentile 20.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00284
2026-10-28
0.00284

Intelligence Sources

nvd ref →

External Links