CVE-2026-0886 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Mozilla Firefox

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-501 — Trust Boundary Violation13 documents9 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 95.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedJan 13
Latest updateFeb 2

Description

Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages3 packages

▶NVDmozilla/firefox128.0 — 140.7.0+2
▶NVDmozilla/thunderbird< 140.7.0+1
▶Debianmozilla/thunderbird< 1:140.7.0esr-1~deb11u1+3

🔴Vulnerability Details

3
OSV
CVE-2026-0886: Incorrect boundary conditions in the Graphics component↗2026-01-13
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CVEList
Incorrect boundary conditions in the Graphics component↗2026-01-13
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GHSA
GHSA-7328-g372-24vf: Incorrect boundary conditions in the Graphics component↗2026-01-13
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Graphics component↗2026-01-13
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Debian
CVE-2026-0886: firefox - Incorrect boundary conditions in the Graphics component. This vulnerability affe...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-03: CVE-2026-0886↗
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Mozilla
Mozilla Foundation Security Advisory 2026-01: CVE-2026-0886↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-0886 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-0886 — Mozilla Firefox vulnerability | cvebase