Linux · Security advisory · May 15, 2026
RHSA-2026:19463: thunderbird security update
RHSA-2026:19463, released May 15, 2026, fixes 26 CVEs in thunderbird (version 140.10.0-1.el10_0). One of them is being exploited (CVE-2026-111497); 1 on CISA KEV. Patch Radar priority: Patch now.
Patch now1 on CISA KEV1 publicly disclosed
CVEs closed
26
None rated Critical
Exploited
1
CVE-2026-111497
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.8264
99th percentile
Priority of the 26 CVEs
Patch now 1
Urgent 0
High 25
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| thunderbird | RHEL 10 | 140.10.0-1.el10_0 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2026-111497 | Google: CVE-2026-111497 Buffer overflow vulnerability in the Brotli decoder | 9.8 | 0.8264 | KEVDisclosedExploited | |
| 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-2026-6759 | Use-after-free in the Widget: Cocoa component | 8.8 | 0.0036 | 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-2026-6766 | 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 | |
| High | CVE-2026-6765 | Information disclosure in the Form Autofill component | 8.8 | 0.0022 | None reported | |
| High | CVE-2026-6763 | Mitigation bypass in the File Handling component | 8.8 | 0.0019 | None reported | |
| High | CVE-2026-6762 | Spoofing issue in the DOM: Core & HTML component | 8.8 | 0.0019 | None reported |
Showing 1 to 25 of 26
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