CVE-2026-73252 Mongoose - Denial of Service

Mongoose < 7.23 contains a denial of service caused by improper TLS 1.3 record size validation in mg_tls_recv_record(), letting unauthenticated malicious TLS peers trigger heap out-of-bounds read, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to version 7.23 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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