What is CVE-2026-58172?

CVE-2026-58172 is a critical-severity vulnerability in Threemammals Ocelot, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-06-30.

How severe is CVE-2026-58172?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Threemammals Ocelot

CVE-2026-58172

Ocelot through 24.1.0, fixed in commit f156fd4, contains a security control bypass vulnerability that allows denied clients to circumvent IP-based access restrictions by sending WebSocket upgrade requests. The WebSocket upgrade pipeline br…

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Threemammals Ocelot — versions 0, f156fd4017ca25025fffdad8ec56c1d657dfb402

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-58172?: CVE-2026-58172 is a critical-severity vulnerability in Threemammals Ocelot, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-06-30.
How severe is CVE-2026-58172?: Critical severity. CVSS v3 base score is 9.1 out of 10.