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CVE-2026-8950

Medium priority
Vulnerable

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8949

Medium priority
Vulnerable

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8948

Medium priority
Vulnerable

Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8947

Medium priority
Vulnerable

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8946

Medium priority
Vulnerable

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8945

Medium priority
Vulnerable

Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8401

Medium priority
Vulnerable

Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8391

Medium priority
Vulnerable

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8390

Medium priority
Vulnerable

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages

CVE-2026-8389

Medium priority
Vulnerable

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

9 affected packages

firefox, mozjs102, mozjs115, mozjs38, mozjs52...

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected — —
mozjs102 Not in release Ignored Ignored — —
mozjs115 Not in release Ignored Not in release — —
mozjs38 Not in release Not in release Not in release — Needs evaluation
mozjs52 Not in release Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Not in release Ignored —
mozjs78 Not in release Not in release Ignored — —
mozjs91 Not in release Not in release Ignored — —
thunderbird Not affected Not affected Vulnerable — —
Show all 9 packages Show less packages