CVE-2026-6770: exploitation status and patch state

CVE-2026-6770 · CVSS 6.5 MEDIUM · EPSS 5%

Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Is CVE-2026-6770 exploited?

• Not in the CISA KEV catalog.
• EPSS puts exploitation in the next 30 days at 5%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2026-6770

• Private Browsing Leaks a Stable Cross-Site Identifier (2026-04-27)

Primary sources

• NVD record

What this record does not say

• No affected package data.
• No patch identifier.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.