High 8.8Published Jul 5, 2023

CVE-2023-37211Memory safety bugs present in Firefox 114, Firefox ESR 102.12, and Thunderbird 102.12.

Updated under an hour ago (Oct 26, 2026, 7:50 PM ET)

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It affects mozilla firefox and 3 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

Memory safety bugs present in Firefox 114, Firefox ESR 102.12, and Thunderbird 102.12. 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 vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.

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-787
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 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 115.0	NVD
mozilla firefox_esr mozilla:firefox_esr	before 102.13	NVD
mozilla thunderbird mozilla:thunderbird	before 102.13	NVD
debian debian_linux debian:debian_linux	10.0; 11.0; 12.0	NVD

References

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1832306%2C1834862%2C1835886%2C1836550%2C1837450	broken-link
https://lists.debian.org/debian-lts-announce/2023/07/msg00006.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00015.html
https://www.debian.org/security/2023/dsa-5450	third-party-advisory
https://www.debian.org/security/2023/dsa-5451	third-party-advisory
https://www.mozilla.org/security/advisories/mfsa2023-22/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-23/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-24/	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.