VDB
DEBIAN-CVE-2026-4716
DEBIAN-CVE-2026-4716
PUBLISHED
CVSS 9.100000381469727 CRITICAL
Record from OSV · Published March 24, 2026
Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
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-esr | Debian:13 | 140.9.0esr-1~deb13u1 |
| thunderbird | Debian:12 | 1:140.9.0esr-1~deb12u1 |
| firefox-esr | Debian:14 | 140.9.0esr-1 |
| thunderbird | Debian:13 | 1:140.9.0esr-1~deb13u1 |
| thunderbird | Debian:14 | 1:140.9.0esr-1 |
| firefox-esr | Debian:12 | 140.9.0esr-1~deb12u1 |
Risk scores
CVSS 3.1
9.100000381469727
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | firefox-esr | 0, 128.13.0esr-1, 128.14.0esr-1 |
| Debian:12 | thunderbird | 1:115.10.1-1~deb12u1, 1:115.11.0-1, 1:115.11.0-1~deb10u1 |
| Debian:14 | firefox-esr | 128.14.0esr-1~deb11u1, 0, 128.13.0esr-1 |
| Debian:13 | thunderbird | 1:140.8.0esr-1~deb12u1, 1:140.8.0esr-1~deb13u1, 1:140.9.0esr-1~deb11u1 |
| Debian:14 | thunderbird | 1:140.9.0esr-1~deb13u1, 1:140.4.0esr-1~deb12u1, 0 |
| Debian:12 | firefox-esr | 0, 102.11.0esr-1, 102.12.0esr-1 |
Timeline
- Mar 24, 2026 CVE Published
- Oct 1, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln DEBIAN-CVE-2026-4716
vulnetix vdb fixes DEBIAN-CVE-2026-4716Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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