CVE-2026-4725 | Mozilla Firefox up to 148 Canvas2D use after free

VDB-352775 · CVE-2026-4725 · GCVE-0-2026-4725 MOZILLA FIREFOX UP TO 148 CANVAS2D USE AFTER FREE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $5k-$25k 2.53+ Summaryinfo A vulnerability has been found in Mozilla Firefox up to 148 and classified as critical. Impacted is an unknown function of the component Canvas2D. The manipulation leads to use after free. This vulnerability is referenced as CVE-2026-4725. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded. Detailsinfo A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 148. This issue affects an unknown part of the component Canvas2D. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is: Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149. It is possible to read the advisory at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2026-4725 since 03/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/24/2026). Upgrading to version 149 eliminates this vulnerability. Productinfo Type Web Browser Vendor Mozilla Name Firefox Version 148 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: Use after free CWE: CWE-416 / CWE-119 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 149 Timelineinfo 03/24/2026 Advisory disclosed 03/24/2026 +0 days CVE reserved 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Vendor: mozilla.org Product: mozilla.org Advisory: bugzilla.mozilla.org Status: Confirmed CVE: CVE-2026-4725 (🔒) GCVE (CVE): GCVE-0-2026-4725 GCVE (VulDB): GCVE-100-352775 Entryinfo Created: 03/24/2026 14:46 Changes: 03/24/2026 14:46 (56) Complete: 🔍 Cache ID: 99:C3D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸