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CVE-2026-4688

Medium priority
Vulnerable

Sandbox escape due to use-after-free in the Disability Access APIs 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 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-2026-4687

Medium priority
Vulnerable

Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, 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
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CVE-2026-4686

Medium priority
Vulnerable

Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, 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-2026-4685

Medium priority
Vulnerable

Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, 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-2026-4684

Medium priority
Vulnerable

Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, 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-2026-4371

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
Show all 9 packages Show less packages

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-2026-3847

Medium priority
Vulnerable

Memory safety bugs present in Firefox 148.0.2. 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 vulnerability...

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-2026-3846

Medium priority
Vulnerable

Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability affects Firefox < 148.0.2.

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
Show all 9 packages Show less packages

CVE-2026-2807

Medium priority
Vulnerable

Memory safety bugs present in Firefox 147 and Thunderbird 147. 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