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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 22.04 LTS
mozjs91 Ignored
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs102 Ignored
mozjs115 Not in release
Show all 9 packages Show less packages

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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs52 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 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 22.04 LTS
mozjs52 Not in release
firefox Not affected
thunderbird Vulnerable
mozjs38 Not in release
mozjs68 Not in release
mozjs78 Ignored
mozjs91 Ignored
mozjs102 Ignored
mozjs115 Not in release
Show all 9 packages Show less packages

CVE-2026-4719

Medium priority
Vulnerable

Incorrect boundary conditions in the Graphics: Text component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

9 affected packages

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

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

CVE-2026-4718

Medium priority
Vulnerable

Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

9 affected packages

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

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