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Vulnerability record · CVE-2026-2761 · published 24 February 2026

CVE-2026-2761: Mozilla firefox vulnerability

Mozilla · Firefox

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.

10.0 CVSS 3.1 Critical EPSS 0.61% · top 52.7% CWE-693 · CWE-693
10.0CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
34References
15 Jul 2026Last modified by NVD

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=2011063 Issue TrackingPermissions Required
https://www.mozilla.org/security/advisories/mfsa2026-13/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-14/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-16/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/ Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3338
https://access.redhat.com/errata/RHSA-2026:3339
https://access.redhat.com/errata/RHSA-2026:3361
https://access.redhat.com/errata/RHSA-2026:3491
https://access.redhat.com/errata/RHSA-2026:3492
https://access.redhat.com/errata/RHSA-2026:3493
https://access.redhat.com/errata/RHSA-2026:3494
https://access.redhat.com/errata/RHSA-2026:3495
https://access.redhat.com/errata/RHSA-2026:3496
https://access.redhat.com/errata/RHSA-2026:3497
https://access.redhat.com/errata/RHSA-2026:3515
https://access.redhat.com/errata/RHSA-2026:3516
https://access.redhat.com/errata/RHSA-2026:3517
https://access.redhat.com/errata/RHSA-2026:3976
https://access.redhat.com/errata/RHSA-2026:3978
https://access.redhat.com/errata/RHSA-2026:3979
https://access.redhat.com/errata/RHSA-2026:3980
https://access.redhat.com/errata/RHSA-2026:3981
https://access.redhat.com/errata/RHSA-2026:3982
https://access.redhat.com/errata/RHSA-2026:3983
https://access.redhat.com/errata/RHSA-2026:3984
https://access.redhat.com/errata/RHSA-2026:4022
https://access.redhat.com/errata/RHSA-2026:4152
https://access.redhat.com/errata/RHSA-2026:4260
https://access.redhat.com/errata/RHSA-2026:4432
https://access.redhat.com/security/cve/CVE-2026-2761
https://bugzilla.redhat.com/show_bug.cgi?id=2442309
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2761.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-2761), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.