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CVE-2025-4919

Medium priority

Some fixes available 1 of 12

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird...

9 affected packages

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
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CVE-2025-4918

Medium priority

Some fixes available 1 of 12

An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

9 affected packages

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
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CVE-2025-4092

Medium priority

Some fixes available 1 of 12

Memory safety bugs present in Firefox 137 and Thunderbird 137. 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 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
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CVE-2025-4091

Medium priority

Some fixes available 1 of 12

Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
Show all 9 packages Show less packages

CVE-2025-4090

Medium priority
Not affected

A vulnerability existed in Thunderbird for Android where potentially sensitive library locations were logged via Logcat. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

2 affected packages

firefox, thunderbird

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not in release
thunderbird Not affected Not affected Not in release
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CVE-2025-4089

Medium priority

Some fixes available 1 of 12

Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was...

9 affected packages

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mozjs52 Not in release Not in release Not in release Ignored Ignored
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release Not in release Not in release Not in release Needs evaluation
mozjs68 Not in release Not in release Not in release Ignored
mozjs78 Not in release Not in release Ignored Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
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CVE-2025-4088

Medium priority

Some fixes available 1 of 12

A security vulnerability in Thunderbird allowed malicious sites to use redirects to send credentialed requests to arbitrary endpoints on any site that had invoked the Storage Access API. This enabled potential Cross-Site Request...

9 affected packages

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
Show all 9 packages Show less packages

CVE-2025-4087

Medium priority

Some fixes available 1 of 12

A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory...

9 affected packages

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

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

CVE-2025-4086

Medium priority
Not affected

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. *This bug only affects Thunderbird for Android. Other versions...

2 affected packages

firefox, thunderbird

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not in release
thunderbird Not affected Not affected Not in release
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CVE-2025-4085

Medium priority

Some fixes available 1 of 12

An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

9 affected packages

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

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not affected Not in release
thunderbird Not affected Not affected Fixed Not in release
mozjs38 Not in release 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 Not in release
mozjs91 Not in release Not in release Ignored Not in release
mozjs102 Not in release Ignored Ignored Not in release
mozjs115 Not in release Ignored Not in release Not in release
Show all 9 packages Show less packages