CyberSecBulletin

Socat vulnerabilities

We track 1 vulnerability in Socat products. 1 is rated high or critical, and none are known to be exploited. The most recent was published on June 25, 2026.

1vulnerabilities
1critical
0high
0exploited
9.8average CVSS score

Latest Socat vulnerabilities

  • 9.8 Critical severity

    socat: Heap-based Buffer Overflow

    CVE-2026-56123Socat

    socat versions 1.8.0.0 through 1.8.1.1 contain a heap-based buffer overflow vulnerability that allows a malicious SOCKS5 proxy server to overwrite adjacent heap memory by exploiting a sign-extension flaw in the DOMAINNAME reply parser. During connection setup,