VDB
DEBIAN-CVE-2026-0877
DEBIAN-CVE-2026-0877
PUBLISHED
CVSS 8.100000381469727 HIGH
Record from OSV · Published January 13, 2026
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| thunderbird | Debian:12 | 1:140.7.0esr-1~deb12u1 |
| thunderbird | Debian:13 | 1:140.7.0esr-1~deb13u1 |
| firefox-esr | Debian:14 | 140.7.0esr-1 |
| firefox-esr | Debian:13 | 140.7.0esr-1~deb13u1 |
| firefox-esr | Debian:12 | 140.7.0esr-1~deb12u1 |
| thunderbird | Debian:14 | 1:140.7.0esr-1 |
Risk scores
CVSS 3.1
8.100000381469727
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | thunderbird | 0, 1:102.11.0-1, 1:102.12.0-1 |
| Debian:13 | thunderbird | 1:140.4.0esr-1~deb12u1, 0, 1:128.13.0esr-1 |
| Debian:14 | firefox-esr | 140.6.0esr-1~deb11u1, 140.6.0esr-1, 0 |
| Debian:13 | firefox-esr | 140.3.0esr-1, 0, 140.7.0esr-1~deb12u1 |
| Debian:12 | firefox-esr | 128.8.0esr-1, 128.8.0esr-1~deb12u1, 128.9.0esr-1 |
| Debian:14 | thunderbird | 1:140.7.0esr-1~deb13u1, 1:140.7.0esr-1~deb12u1, 1:140.7.0esr-1~deb11u1 |
Timeline
- Jan 13, 2026 CVE Published
- Oct 1, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln DEBIAN-CVE-2026-0877
vulnetix vdb fixes DEBIAN-CVE-2026-0877Or 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/DEBIAN-CVE-2026-0877/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart