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If a malicious attacker has used another vulnerability to gain full control over a content process, they may be able to replace the alternate data resources stored in the JavaScript Start-up Bytecode Cache (JSBC) for other JavaScript code. If the parent process then runs this replaced code, the executed script would be run with the parent process' privileges, escaping the sandbox on content processes. This vulnerability affects Firefox < 60.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Freebsd | — | Upgrade firefox-esrUpgrade waterfoxUpgrade linux-seamonkeyUpgrade firefoxUpgrade linux-thunderbirdUpgrade seamonkeyUpgrade thunderbirdUpgrade libxulUpgrade linux-firefox | May 10, 2018 | May 9, 2018 |
| Mfsa2018 11 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 60.0 | May 10, 2018 | May 9, 2018 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaFirefoxUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-common | May 20, 2018 | May 9, 2018 |
| Ubuntu | — | Upgrade firefox | May 22, 2018 | May 9, 2018 |
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