CVE-2026-2761

CRITICAL EPSS 31.7%
Published Feb 24, 20264mo ago · Modified Jun 17, 20261w ago
10.0 CVSS 3.1
Critical
Find Similar
Published Feb 24, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

Sandbox escape in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

CVSS Details

Base Score
10.0
Exploitability
3.9
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
31.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-693

Affected Products 5

VendorProductVersionRange
mozillafirefox* <115.33.0
mozillafirefox* <148.0
mozillafirefox*≥128.0  –  <140.8.0
mozillathunderbird* <140.8.0
mozillathunderbird* <148.0

References 6

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2011063
    Issue TrackingPermissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-13/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-14/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-15/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-16/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-17/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.