CVE-2026-6770 | Mozilla Firefox up to 149 IndexedDB Remote Code Execution

VDB-358470 · CVE-2026-6770 · GCVE-0-2026-6770 MOZILLA FIREFOX UP TO 149 INDEXEDDB REMOTE CODE EXECUTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $5k-$25k 0.87+ Summaryinfo A vulnerability classified as critical was found in Mozilla Firefox up to 149. This affects an unknown part of the component IndexedDB. The manipulation results in an unknown weakness. This vulnerability is known as CVE-2026-6770. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised. Detailsinfo A vulnerability classified as critical has been found in Mozilla Firefox up to 149. Affected is an unknown function of the component IndexedDB. The impact remains unknown. CVE summarizes: Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10. The advisory is available at bugzilla.mozilla.org. This vulnerability is traded as CVE-2026-6770 since 04/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 04/21/2026). Upgrading to version 150 eliminates this vulnerability. Productinfo Type Web Browser Vendor Mozilla Name Firefox Version 149 License open-source Website Vendor: https://www.mozilla.org/ Product: https://www.mozilla.org/en-US/firefox/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Remote Code Execution CWE: Unknown CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Firefox 150 Timelineinfo 04/21/2026 Advisory disclosed 04/21/2026 +0 days CVE reserved 04/21/2026 +0 days VulDB entry created 04/21/2026 +0 days VulDB entry last update Sourcesinfo Vendor: mozilla.org Product: mozilla.org Advisory: bugzilla.mozilla.org Status: Confirmed CVE: CVE-2026-6770 (🔒) GCVE (CVE): GCVE-0-2026-6770 GCVE (VulDB): GCVE-100-358470 Entryinfo Created: 04/21/2026 16:04 Changes: 04/21/2026 16:04 (54) Complete: 🔍 Cache ID: 99:B86:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸