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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
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CVE-2026-4728

Medium priority
Vulnerable

Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4727

Medium priority
Vulnerable

Denial-of-service in the Libraries component in NSS. This vulnerability affects Firefox < 149 and Thunderbird < 149.

9 affected packages

mozjs91, firefox, thunderbird, mozjs38, mozjs52...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mozjs91 Not in release Ignored
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
mozjs102 Ignored Ignored
mozjs115 Ignored Not in release
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CVE-2026-4726

Medium priority
Vulnerable

Denial-of-service in the XML component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4725

Medium priority
Vulnerable

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4724

Medium priority
Vulnerable

Undefined behavior in the Audio/Video component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4723

Medium priority
Vulnerable

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4722

Medium priority
Vulnerable

Privilege escalation in the IPC component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

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-2026-4721

Medium priority
Vulnerable

Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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
Show all 9 packages Show less packages

CVE-2026-4720

Medium priority
Vulnerable

Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, 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...

9 affected packages

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

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mozjs52 Not in release Not in release Ignored Ignored
firefox Not affected Not affected
thunderbird Not affected Vulnerable
mozjs38 Not in release Not in release Needs evaluation
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