Medium 6.5Published Jun 2, 2023

CVE-2023-1945Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash.

Updated under an hour ago (Oct 26, 2026, 5:00 AM ET)

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It affects mozilla firefox_esr and 1 other product. 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

Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 102.10 and Firefox ESR < 102.10.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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_esr mozilla:firefox_esr	before 102.10	NVD
mozilla thunderbird mozilla:thunderbird	before 102.10	NVD

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1777588issue-tracking, permissions-required, vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-14/vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/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.