CVE-2026-0885

What it is

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-01-13 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 10:11 UTC Last updatedMost recent change to the record

Details

Published

2026-01-13 14:16 UTC

Last modified

2026-06-17 10:11 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-416 · Use after free

Record status

Modified

Affected

• Mozilla Firefox < 140.7.0
• Mozilla Firefox < 147.0
• Mozilla Thunderbird < 140.7.0
• Mozilla Thunderbird < 147.0

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low