CVE catalog
CVE-2026-4729
UBUNTU-CVE-2026-4729
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.34% · Oct 25, 2026
Memory safety bugs present in Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | mozjs52 | 18.04 | 52.3.1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.3.1-7fakesync1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.8.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.9.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu4 | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.5.0-1~fakesync | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.5.0-2~fakesync | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.6.0-1 | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.6.0-1ubuntu1 | vulnerable |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1build1 | vulnerable |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1ubuntu3 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.11.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.12.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.13.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.15.1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.13.0-1 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.15.0-2 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.15.0-4ubuntu1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.5.1-0ubuntu1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.6.0-1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.6.0-2 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.7.0-2 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.10.0-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.1.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.4.0+build1.1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.4.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.5.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.5.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.6.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.7.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.7.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.8.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.9.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.11.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.2.2+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.4.2+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.7.1+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.8.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.9.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.10.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.11.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.13.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.15.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.15.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.3.1+build1-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.4.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.5.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.6.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.8.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.9.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.10.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.11.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.12.0+build3-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.13.0+build5-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.15.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.16.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.18.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:128.12.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:140.7.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 24.04 | 102.15.1-1 | vulnerable |
| Ubuntu | mozjs102 | 24.04 | 102.15.1-3ubuntu2 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.3.0-0ubuntu1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.4.0-2 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.5.0-1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.6.0-1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.7.0-4 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.8.0-1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.9.0-1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.9.0-1build1 | vulnerable |
| Ubuntu | mozjs115 | 24.04 | 115.10.0-1 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11373-1.json]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-4729]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4729.json]
[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]