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CVE-2026-5734

Medium priority
Vulnerable

Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of...

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-5732

Medium priority
Vulnerable

Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability affects Firefox < 149.0.2, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and Thunderbird < 140.9.1.

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-5731

Medium priority
Vulnerable

Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough...

9 affected packages

mozjs68, mozjs78, mozjs91, mozjs102, mozjs115...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
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CVE-2026-5735

Medium priority
Vulnerable

Memory safety bugs present in Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code....

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-5733

Medium priority
Vulnerable

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability affects Firefox < 149.0.2 and Thunderbird < 149.0.2.

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-33636

Medium priority
Needs evaluation

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's...

5 affected packages

libpng, libpng1.6, firefox, thunderbird, chromium-browser

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libpng Not in release Not in release
libpng1.6 Needs evaluation Needs evaluation Needs evaluation Needs evaluation
firefox Not affected Not affected
thunderbird Not affected Not affected
chromium-browser Not affected Not affected
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CVE-2026-33416

Medium priority
Needs evaluation

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a...

5 affected packages

libpng, libpng1.6, firefox, thunderbird, chromium-browser

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libpng Not in release Not in release
libpng1.6 Needs evaluation Needs evaluation Needs evaluation Needs evaluation
firefox Not affected Not affected
thunderbird Not affected Not affected
chromium-browser Not affected Not affected
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CVE-2026-4371

Medium priority
Vulnerable

A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser...

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-3889

Medium priority
Vulnerable

Spoofing issue in Thunderbird. This vulnerability affects Thunderbird < 149 and Thunderbird < 140.9.

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
Show all 9 packages Show less packages

CVE-2026-4729

Medium priority
Vulnerable

Memory safety bugs present in Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This...

9 affected packages

firefox, thunderbird, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored
mozjs78 Not in release Ignored
mozjs91 Not in release Ignored
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
Show all 9 packages Show less packages