CVE-2026-117988
published 2026-10-27CVE-2026-117988: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6…
PriorityP425medium6.1
EPSS
0.18%
7.7th percentile
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 159 | Firefox 159 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 153.6 | Firefox ESR 153.6 |
| mozilla | thunderbird | < Thunderbird 153.6 | Thunderbird 153.6 |
| mozilla | thunderbird | < Thunderbird 159 | Thunderbird 159 |
| rhel10 | firefox-flatpak | — | — |
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Red Hat
firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
vendor_redhat·2026-10-27·CVSS 6.1
CVE-2026-117988 [MEDIUM] CWE-787 firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6)
Mozilla
Mozilla Foundation Security Advisory 2026-120: CVE-2026-117988
vendor_mozilla
CVE-2026-117988 Mozilla Foundation Security Advisory 2026-120: CVE-2026-117988
Mozilla Foundation Security Advisory 2026-120
CVE: CVE-2026-117988
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.6
Mozilla
Mozilla Foundation Security Advisory 2026-122: CVE-2026-117988
vendor_mozilla
CVE-2026-117988 Mozilla Foundation Security Advisory 2026-122: CVE-2026-117988
Mozilla Foundation Security Advisory 2026-122
CVE: CVE-2026-117988
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.6
Mozilla
Mozilla Foundation Security Advisory 2026-121: CVE-2026-117988
vendor_mozilla
CVE-2026-117988 Mozilla Foundation Security Advisory 2026-121: CVE-2026-117988
Mozilla Foundation Security Advisory 2026-121
CVE: CVE-2026-117988
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 159
Mozilla
Mozilla Foundation Security Advisory 2026-118: CVE-2026-117988
vendor_mozilla
CVE-2026-117988 Mozilla Foundation Security Advisory 2026-118: CVE-2026-117988
Mozilla Foundation Security Advisory 2026-118
CVE: CVE-2026-117988
Product: Firefox
Impact: low
Fixed in: Firefox 159
GHSA
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component.
ghsa_unreviewed·2026-10-27
CVE-2026-117988 Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component.
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
No detection rules found.
No public exploits indexed.
2026-10-27
Published