CVE-2026-6770

MEDIUM

Mozilla Firefox and Thunderbird 140.10 and 150 - IndexedDB Information Disclosure

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-6770. PoCs published by adminlove520, nightcorefan94.

AI-analyzed exploit summary The repository contains only a minimal README with no exploit code, technical details, or functional PoC. It merely states the CVE and affected software without any substance.

Description

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

Exploits (2)

github STUB 4 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2026/CVE-2026-6770

The repository contains only a minimal README with no exploit code, technical details, or functional PoC. It merely states the CVE and affected software without any substance.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Firefox/Tor (version unspecified)
No auth needed
devstral-2 · analyzed May 17, 2026 Full analysis →
github STUB
by nightcorefan94 · htmlpoc
https://github.com/nightcorefan94/CVE-2026-6770

The repository contains only a minimal README with a CVE title and no exploit code, technical details, or functional content. It lacks any meaningful information or proof-of-concept implementation.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Firefox/Tor (version unspecified)
No auth needed
devstral-2 · analyzed Apr 29, 2026 Full analysis →

References (5)

Core 5

Scores

CVSS v3 6.5
EPSS 0.0494
EPSS Percentile 91.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-200
Status published
Products (7)
mozilla/firefox < 140.10.0
mozilla/firefox < 150.0
Mozilla/Firefox 140.10 - 140.*
Mozilla/Firefox 150
mozilla/thunderbird < 140.10.0
Mozilla/Thunderbird 140.10 - 140.*
Mozilla/Thunderbird 150
Published Apr 21, 2026
Tracked Since Apr 21, 2026