Is CVE-2026-6770 actively exploited?

No active exploitation of CVE-2026-6770 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6770 be exploited remotely?

Yes. CVE-2026-6770 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6770?

CVE-2026-6770 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2026-6770

MEDIUM

CVE-2026-6770

Published: April 21, 2026· Updated: Apr 22, 2026

6.5

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-6770 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Affected Vendors & Products

Mozilla2 products

firefoxthunderbird

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-30/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-32/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-33/

ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-34/

News & Research Mentioning CVE-2026-6770

Firefox Vulnerability Allows Tor User Fingerprinting

SecurityWeek· Apr 27, 2026

The vulnerability is tracked as CVE-2026-6770 and it has been patched with the release of Firefox 150 and Tor 15.0.10. The post Firefox Vulnerability Allows Tor User Fingerprinting appeared first on SecurityWeek. [xlite_meta score:50 src:SecurityWeek xlite_fp:ab6b1d01ec853a3f8ec5752a713eefe724a45369c374b8b9c23e106b96e3d6d4]