VDB
DEBIAN-CVE-2026-6761
DEBIAN-CVE-2026-6761
PUBLISHED
CVSS 8.800000190734863 HIGH
Record from OSV · Published April 21, 2026
Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
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:14 | 140.10.0esr-1 |
| thunderbird | Debian:12 | 1:140.10.0esr-1~deb12u1 |
| firefox-esr | Debian:13 | 140.10.0esr-1~deb13u1 |
| firefox-esr | Debian:12 | 140.10.0esr-1~deb12u1 |
| thunderbird | Debian:14 | 1:140.10.0esr-1 |
| thunderbird | Debian:13 | 1:140.10.0esr-1~deb13u1 |
Risk scores
CVSS 3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | firefox-esr | 140.6.0esr-1~deb12u1, 140.6.0esr-1~deb11u1, 140.6.0esr-1 |
| Debian:12 | thunderbird | 1:120.0~b1-1, 1:121.0~b3-1, 1:122.0~b2-1 |
| Debian:13 | firefox-esr | 140.3.1esr-1~deb13u1, 0, 128.13.0esr-1 |
| Debian:12 | firefox-esr | 140.9.1esr-1~deb13u1, 115.5.0esr-1~deb11u1, 115.5.0esr-1~deb12u1 |
| Debian:14 | thunderbird | 1:140.3.0esr-1~deb11u1, 0, 1:128.13.0esr-1 |
| Debian:13 | thunderbird | 1:140.9.0esr-1~deb12u1, 1:140.9.0esr-1~deb13u1, 1:140.9.1esr-1 |
Timeline
- Apr 21, 2026 CVE Published
- Oct 27, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
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vulnetix vdb fixes DEBIAN-CVE-2026-6761Or with curl, using the org id and key from your account page:
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