CVE-2026-16398

HIGH
MEDIUM Priority: 0.02 BB Relevance: 75/100
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

CVSS Vector Breakdown

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

Description

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Weakness Classification (2)

Affected Software (2)

VendorProductVersion
mozilla firefox < 153.0.0
mozilla thunderbird < 153.0

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.22%
Raw Score 0.002170
Percentile 12.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00217
2026-10-28
0.00217

Intelligence Sources

nvd ref →