Thunderbird 135: Fixing Bugs Faster Than You Can Say “Use-After-Free”
Thunderbird 135 swoops in to save the day, squashing bugs like a superhero with a flyswatter. From use-after-free mishaps to fullscreen notification shenanigans, this update tackles vulnerabilities with flair. Rest easy, your email is safe—just watch out for those sneaky browser contexts!

Hot Take:
Mozilla’s latest patch for Thunderbird 135 proves once again that keeping your software updated is as essential as keeping your coffee mug filled. With a flurry of high and moderate impact vulnerabilities under its belt, it’s clear that Thunderbird wants to soar above security risks, rather than crash land into them!
Key Points:
- Thunderbird 135 addresses multiple high-impact vulnerabilities, including use-after-free and memory safety bugs.
- Most vulnerabilities pose potential risks in browser-like contexts, despite scripting being disabled in emails.
- Several issues involve the improper handling of data, leading to exploitable crashes or spoofing attacks.
- Memory safety bugs in both Thunderbird and Firefox versions have been patched to prevent arbitrary code execution.
- The latest fixes aim to mitigate risks ranging from privacy leaks to spoofed email addresses.
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