Out-of-bounds read in Mongoose - CVE-2026-52061
Published: August 12, 2026
Vulnerability identifier: #VU142193
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-52061
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information or cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the mg_tls_recv_cert() function when parsing a TLS Certificate handshake message. A remote attacker can send a specially crafted Certificate message to disclose sensitive information or cause a denial of service.
The issue can be triggered during the TLS handshake before any application-layer authentication and is also reachable on the server side when mutual TLS processes a malicious client certificate.
Affected software
Mongoose
How to mitigate CVE-2026-52061
Install security update from vendor's website.
Mongoose - update to 7.22