Linux · 
Rocky Linux · Security advisory · May 28, 2026
Rocky Linux · Security advisory · May 28, 2026RLSA-2026:19348: thunderbird security update
RLSA-2026:19348, released May 28, 2026, fixes 29 CVEs in thunderbird (version 0:140.10.1-1.el9_8). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
29
None rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.0388
90th percentile
Priority of the 29 CVEs
Patch now 0
Urgent 0
High 29
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| thunderbird | rocky 9 | 0:140.10.1-1.el9_8 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-6770 | Other issue in the Storage: IndexedDB component | 8.8 | 0.0388 | None reported |
| High | CVE-2026-6746 | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0095 | None reported |
| High | CVE-2026-6785 | Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 | 8.8 | 0.0051 | None reported |
| High | CVE-2026-6786 | Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 | 8.8 | 0.0050 | None reported |
| High | CVE-2026-6757 | Invalid pointer in the JavaScript: WebAssembly component | 8.8 | 0.0049 | None reported |
| High | CVE-2026-6750 | Privilege escalation in the Graphics: WebRender component | 8.8 | 0.0048 | None reported |
| High | CVE-2026-6749 | Information disclosure due to uninitialized memory in the Graphics: Canvas2D component | 8.8 | 0.0040 | None reported |
| High | CVE-2026-6747 | Use-after-free in the WebRTC component | 8.8 | 0.0040 | None reported |
| High | CVE-2026-6748 | Uninitialized memory in the Audio/Video: Web Codecs component | 9.8 | 0.0040 | None reported |
| High | CVE-2026-6772 | Incorrect boundary conditions in the Libraries component in NSS | 8.8 | 0.0039 | None reported |
| High | CVE-2026-6754 | Use-after-free in the JavaScript Engine component | 8.8 | 0.0039 | None reported |
| High | CVE-2026-7323 | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | 8.8 | 0.0038 | None reported |
| High | CVE-2026-6759 | Use-after-free in the Widget: Cocoa component | 8.8 | 0.0036 | None reported |
| High | CVE-2026-7320 | Information disclosure due to incorrect boundary conditions in the Audio/Video component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-7322 | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | 8.8 | 0.0032 | None reported |
| High | CVE-2026-6771 | Mitigation bypass in the DOM: Security component | 9.8 | 0.0031 | None reported |
| High | CVE-2026-6751 | Uninitialized memory in the Audio/Video: Web Codecs component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-6752 | Incorrect boundary conditions in the WebRTC component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-6753 | Incorrect boundary conditions in the WebRTC component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-7321 | Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component | 9.6 | 0.0026 | None reported |
| High | CVE-2026-6766 | Incorrect boundary conditions in the Libraries component in NSS | 8.8 | 0.0026 | None reported |
| High | CVE-2026-6764 | Incorrect boundary conditions in the DOM: Device Interfaces component | 8.8 | 0.0023 | None reported |
| High | CVE-2026-6767 | Other issue in the Libraries component in NSS | 8.8 | 0.0023 | None reported |
| High | CVE-2026-6769 | Privilege escalation in the Debugger component | 8.8 | 0.0023 | None reported |
| High | CVE-2026-6761 | Privilege escalation in the Networking component | 8.8 | 0.0022 | None reported |
Showing 1 to 25 of 29
1Next
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.