Vulnerability details
CVE-2026-124864
Sandbox escape due to use-after-free in the DOM: Service Workers component
CVSS 3.1
9.6Critical
Official description
Sandbox escape due to use-after-free in the DOM: Service Workers component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.6Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
6- https://bugzilla.mozilla.org/show_bug.cgi?id=2075976
- https://www.mozilla.org/security/advisories/mfsa2026-125/
- https://www.mozilla.org/security/advisories/mfsa2026-126/
- https://www.mozilla.org/security/advisories/mfsa2026-127/
- https://www.mozilla.org/security/advisories/mfsa2026-128/
- https://www.mozilla.org/security/advisories/mfsa2026-129/
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Details
- Published
- 2026-11-10
- Last updated
- 2026-11-10
- State
- Published
- Assigner (CNA)
- mozilla
- Kolun priority
- 23 · Low
Exploit prediction (EPSS)
0.39%
Probability of exploitation in 30 days
34.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free