Vulnerability details
CVE-2026-100792
JIT miscompilation in the JavaScript: WebAssembly component
CVSS 3.1
7.1High
Official description
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
7- https://bugzilla.mozilla.org/show_bug.cgi?id=2073266
- https://www.mozilla.org/security/advisories/mfsa2026-100/
- https://www.mozilla.org/security/advisories/mfsa2026-101/
- https://www.mozilla.org/security/advisories/mfsa2026-102/
- https://www.mozilla.org/security/advisories/mfsa2026-103/
- https://www.mozilla.org/security/advisories/mfsa2026-97/
- https://www.mozilla.org/security/advisories/mfsa2026-99/
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Details
- Published
- 2026-09-29
- Last updated
- 2026-10-01
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.26%
Probability of exploitation in 30 days
18%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-843Access of Resource Using Incompatible Type ('Type Confusion')