Dashboard / CVE-2026-12327

CVE-2026-12327

HIGH
MEDIUM Priority: 0.03 BB Relevance: 66/100
Published: 2026-06-16 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Weakness Classification (1)

Affected Software (5)

VendorProductVersion
mozilla firefox < 115.37.0
mozilla firefox < 152.0.0
mozilla firefox 140.0 – 140.12.0
mozilla thunderbird < 152.0.0
mozilla thunderbird 140.0 – 140.12.0

References & Advisories (5)

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

8.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.41%
Raw Score 0.004070
Percentile 34.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00407
2026-10-28
0.00407

Intelligence Sources

nvd ref →

External Links