CVE-2026-123114.7MediumCWE-688

CVE-2026-12311: Information disclosure, sandbox escape in the Security: Process Sandboxing component

Mozilla · Firefox

Vendor fix available · Affected: Mozilla Firefox · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

8th percentile

050100

Higher than 8% of scored CVEs

4.7MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Mozilla · FirefoxVersions not stated
Mozilla · ThunderbirdVersions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Function Call With Incorrect Variable or Reference as Argument · Input Validation and Logic
Vendor: Mozilla
Published: June 2026
Band: Unlikely (under 1%), June 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-12311 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.