What’s Vulnerable › Vulnerabilities

CVE-2026-97152

• Severity: high (CVSS 8.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-09-24
• Weakness: CWE-122

Description

Nanomsg versions 0.5-beta through 1.x before 1.2.3 has a remotely exploitable buffer overflow in the WebSocket transport, due to an unchecked copy of the Sec-WebSocket-Version header, through snprintf.

Affected products

• Nanomsg: from 0.5.0 before 1.2.3 — fixed in 1.2.3

How to fix

Upgrade to a fixed version: Nanomsg 1.2.3. Check the vendor advisory for mitigations.

References

• https://github.com/nanomsg/nanomsg/pull/1130
• https://github.com/nanomsg/nanomsg/releases/tag/1.2.3
• https://nanomsg.org

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