High 8.8Published Jul 12, 2023

CVE-2023-3600During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash.

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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It affects mozilla firefox and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.

CVSS: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 115.0.2	NVD
mozilla firefox_esr mozilla:firefox_esr	before 115.0.2	NVD
mozilla thunderbird mozilla:thunderbird	before 115.0.1	NVD

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1839703	issue-tracking, permissions-required, vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-26/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-27/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.