CVE-2026-4689

Publication date 26 March 2026

Last updated 26 March 2026

Ubuntu priority

Medium

Why this priority?

Description

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

Read the notes from the security team

Status

Package Ubuntu Release Status
mozjs91 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Ignored
firefox 25.10 questing
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
thunderbird 25.10 questing
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Vulnerable
mozjs38 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Needs evaluation
mozjs52 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Ignored
18.04 LTS bionic Ignored
mozjs68 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Ignored
mozjs78 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Ignored
mozjs102 25.10 questing Not in release
24.04 LTS noble Ignored
22.04 LTS jammy Ignored
mozjs115 25.10 questing Not in release
24.04 LTS noble Ignored
22.04 LTS jammy Not in release

Notes

mdeslaur

mozjs* contain a copy of the SpiderMonkey JavaScript engine. It is not feasible to backport security fixes to the mozjs* packages, as such, marking them as ignored. starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap starting with Ubuntu 24.04, the thunderbird package is just a script that installs the Thunderbird snap

References

Other references

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