Slackware released updated Mozilla Thunderbird packages for versions 15.0 and -current to address critical security vulnerabilities tracked under advisory SSA:2026-204-01. The upgrade bumps the email client to version 140.13 ESR, resolving issues documented in Mozilla Advisory MFSA2026-72 and spanning numerous CVE identifiers including CVE-2026-14899 through CVE-2026-16412. Users can install the fixed packages via upgradepkg as root, with downloads available for both i686 and x86_64 architectures on the official Slackware FTP mirrors hosted by the OSU Open Source Lab.

mozilla-thunderbird (SSA:2026-204-01)

mozilla-thunderbird (SSA:2026-204-01)

mozilla-thunderbird (SSA:2026-204-01)

New mozilla-thunderbird packages are available for Slackware 15.0 and -current
to fix security issues.

Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/mozilla-thunderbird-140.13.0esr-i686-1_slack15.0.txz: Upgraded.
This release contains security fixes and improvements.
For more information, see:
https://www.mozilla.org/en-US/thunderbird/140.13.0esr/releasenotes/
https://www.mozilla.org/en-US/security/advisories/mfsa2026-72/
https://www.cve.org/CVERecord?id=CVE-2026-14899
https://www.cve.org/CVERecord?id=CVE-2026-15718
https://www.cve.org/CVERecord?id=CVE-2026-15719
https://www.cve.org/CVERecord?id=CVE-2026-16349
https://www.cve.org/CVERecord?id=CVE-2026-16350
https://www.cve.org/CVERecord?id=CVE-2026-16362
https://www.cve.org/CVERecord?id=CVE-2026-16351
https://www.cve.org/CVERecord?id=CVE-2026-16352
https://www.cve.org/CVERecord?id=CVE-2026-16363
https://www.cve.org/CVERecord?id=CVE-2026-16353
https://www.cve.org/CVERecord?id=CVE-2026-16354
https://www.cve.org/CVERecord?id=CVE-2026-16368
https://www.cve.org/CVERecord?id=CVE-2026-16369
https://www.cve.org/CVERecord?id=CVE-2026-16355
https://www.cve.org/CVERecord?id=CVE-2026-16356
https://www.cve.org/CVERecord?id=CVE-2026-16357
https://www.cve.org/CVERecord?id=CVE-2026-16371
https://www.cve.org/CVERecord?id=CVE-2026-16374
https://www.cve.org/CVERecord?id=CVE-2026-16375
https://www.cve.org/CVERecord?id=CVE-2026-16377
https://www.cve.org/CVERecord?id=CVE-2026-16379
https://www.cve.org/CVERecord?id=CVE-2026-16358
https://www.cve.org/CVERecord?id=CVE-2026-16381
https://www.cve.org/CVERecord?id=CVE-2026-16383
https://www.cve.org/CVERecord?id=CVE-2026-16387
https://www.cve.org/CVERecord?id=CVE-2026-16390
https://www.cve.org/CVERecord?id=CVE-2026-16391
https://www.cve.org/CVERecord?id=CVE-2026-16359
https://www.cve.org/CVERecord?id=CVE-2026-16396
https://www.cve.org/CVERecord?id=CVE-2026-16405
https://www.cve.org/CVERecord?id=CVE-2026-16412
https://www.cve.org/CVERecord?id=CVE-2026-16360
https://www.cve.org/CVERecord?id=CVE-2026-16361
(* Security fix *)
+--------------------------+

Where to find the new packages:
+-----------------------------+

Thanks to the friendly folks at the OSU Open Source Lab
( http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project! :-)

Also see the "Get Slack" section on http://slackware.com for
additional mirror sites near you.

Updated package for Slackware 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/mozilla-thunderbird-140.13.0esr-i686-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/mozilla-thunderbird-140.13.0esr-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-thunderbird-140.13.0esr-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-thunderbird-140.13.0esr-x86_64-1.txz

MD5 signatures:
+-------------+

Slackware 15.0 package:
a8c3c2cdc9a5760ca4e65321f2d7a814 mozilla-thunderbird-140.13.0esr-i686-1_slack15.0.txz

Slackware x86_64 15.0 package:
806fdd91963f3dafdacdc43146fa8d5b mozilla-thunderbird-140.13.0esr-x86_64-1_slack15.0.txz

Slackware -current package:
505652efc7e0741a944e543d8c03c95a xap/mozilla-thunderbird-140.13.0esr-i686-1.txz

Slackware x86_64 -current package:
c1bc63c6b4adcc6960bc1f5584027d3e xap/mozilla-thunderbird-140.13.0esr-x86_64-1.txz

Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg mozilla-thunderbird-140.13.0esr-i686-1_slack15.0.txz

+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key