CVE-2016-5287

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-11 · updated 2026-06-17
Weakness: CWE-416

Description

A potentially exploitable use-after-free crash during actor destruction with service workers. This issue does not affect releases earlier than Firefox 49. This vulnerability affects Firefox < 49.0.2.

Affected products

Mozilla Firefox: before 49.0.2 — fixed in 49.0.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 49.0.2. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/93811
http://www.securitytracker.com/id/1037077
https://bugzilla.mozilla.org/show_bug.cgi?id=1309823
https://www.mozilla.org/security/advisories/mfsa2016-87/
http://www.securityfocus.com/bid/93811
http://www.securitytracker.com/id/1037077
https://bugzilla.mozilla.org/show_bug.cgi?id=1309823
https://www.mozilla.org/security/advisories/mfsa2016-87/

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