All vulnerabilities
CVE-2026-109719

Firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component

Mozilla FirefoxApplications & CMS
Open in ThreatlineRecord JSON
CVSS
4.2Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published13 Oct 2026Updated 13 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

Race condition, use-after-free in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Text from CVE List

Affected versions 5

  • Firefoxunaffected: 115.43 through 115.*CVE List
  • Firefoxunaffected: 153.5 through 153.*CVE List
  • Firefoxunaffected: 158CVE List
  • Thunderbirdunaffected: 153.5 through 153.*CVE List
  • Thunderbirdunaffected: 158CVE List

References 6