thunderbird-128.8.0esr

[Joe Locash]

What’s Fixed

• Opening an .EML file in profiles with many folders could take a long time.
• Users with many folders experienced poor performance when resizing message panes.
• "Replace" button in compose window was overwritten when the window was narrow.
• Export to mobile did not work when "Use default server" was selected.
• "Save Link As" was not working in feed web content.

Security fixes

​https://www.mozilla.org/en-US/security/advisories/mfsa2025-18/

• CVE-2024-43097: Overflow when growing an SkRegion's RunArray (critical)
• CVE-2025-1930: AudioIPC StreamData could trigger a use-after-free in the Browser process (high)
• CVE-2025-1931: Use-after-free in WebTransportChild (high)
• CVE-2025-1932: Inconsistent comparator in XSLT sorting led to out-of-bounds access (high)
• CVE-2025-1933: JIT corruption of WASM i32 return values on 64-bit CPUs (high)
• CVE-2025-1934: Unexpected GC during RegExp bailout processing (moderate)
• CVE-2025-1935: Clickjacking the registerProtocolHandler info-bar (low)
• CVE-2025-1936: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents (low)
• CVE-2025-1937: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 (high)
• CVE-2025-1938: Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8 (high)

[Douglas R. Reno]

Fixed at cbaa10864426025804fc9c0bb35719a2ac09a24d

SA-12.3-003 issued