Vulnerability details
CVE-2026-0878
Red Hat Enterprise Linux 10
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
CVSS 3.1
7.5High
Official description
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.0High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 10 | All | CVEProject cvelistV5 (CNA) |
References and advisories
31- https://bugzilla.mozilla.org/show_bug.cgi?id=2003989
- https://www.mozilla.org/security/advisories/mfsa2026-01/
- https://www.mozilla.org/security/advisories/mfsa2026-03/
- https://www.mozilla.org/security/advisories/mfsa2026-04/
- https://www.mozilla.org/security/advisories/mfsa2026-05/
- https://access.redhat.com/security/cve/CVE-2026-0878 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2428965 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0878.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:2231 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2271 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2286 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:0667 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2220 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2074 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1471 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2073 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1461 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2070 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1487 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2069 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1462 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2047 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1413 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2044 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1415 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2041 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1414 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:2043 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:1320 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:0694 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:0924 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-01-13
- Last updated
- 2026-07-15
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-20Improper Input Validation