VDB
CVE-2026-109716
CVE-2026-109716
PUBLISHED
CVSS 8.1 HIGH
Incorrect boundary conditions in the JavaScript Engine component
Reported by mozilla · Published October 13, 2026
Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| firefox-debugsource | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64, 0:153.5.0-1.el8_10.x86_64, 0:153.5.0-1.el8_10.aarch64, 0:153.5.0-1.el10_2.x86_64, 0:153.5.0-1.el10_2.s390x, 0:153.5.0-1.el10_2.ppc64le, 0:153.5.0-1.el10_2.aarch64 |
| firefox | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.src, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64, 0:153.5.0-1.el8_10.x86_64, 0:153.5.0-1.el8_10.src, 0:153.5.0-1.el8_10.aarch64, 0:153.5.0-1.el10_2.x86_64, 0:153.5.0-1.el10_2.src, 0:153.5.0-1.el10_2.s390x, 0:153.5.0-1.el10_2.ppc64le, 0:153.5.0-1.el10_2.aarch64 |
| firefox-debuginfo | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64, 0:153.5.0-1.el8_10.x86_64, 0:153.5.0-1.el8_10.aarch64, 0:153.5.0-1.el10_2.x86_64, 0:153.5.0-1.el10_2.s390x, 0:153.5.0-1.el10_2.ppc64le, 0:153.5.0-1.el10_2.aarch64 |
| firefox | Amazon Linux | 153.5.0-1.amzn2023.0.1 |
| thunderbird | Amazon Linux | 153.5.1-1.amzn2.0.1 |
| thunderbird | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.src, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64 |
| firefox-x11 | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64 |
| thunderbird-debuginfo | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64 |
| firefox-esr-140 | Chainguard | 140.17.0-r2 |
| thunderbird-debugsource | errata.rockylinux.org | 0:153.5.0-1.el9_8.x86_64, 0:153.5.0-1.el9_8.s390x, 0:153.5.0-1.el9_8.ppc64le, 0:153.5.0-1.el9_8.aarch64 |
Risk scores
CVSS 3.1
8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 115.43, 153.5, 158 |
| Mozilla | Thunderbird | 153.5, 158 |
| amazon:2023 | firefox | 0 |
| amazon:2 | thunderbird | 0 |
| chainguard | firefox-esr-140 | 0 |
| Mozilla | Firefox | 158, 115.43, 153.5 |
| Mozilla | Thunderbird | 158, 153.5 |
Timeline
- Oct 13, 2026 CVE Published
- Oct 14, 2026 EPSS Score (7 in total, the first dated here)
- Nov 4, 2026 Distribution Patch (4 in total, the first dated here)
- Nov 4, 2026 Security Advisory
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-109716
vulnetix vdb fixes CVE-2026-109716Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-109716/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart