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CVE-2026-77322— SIPGO: DoS via unvalidated WebSocket frame length

Quick assessment

Affected
emiago sipgo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SIPGO is a library for writing SIP services in the GO language. Prior to 1.4.3, WSConnection.Read in sip/transport_ws.go creates a wsutil.Reader without setting MaxFrameSize, allowing NextFrame to accept a client-controlled header.Length before ParseMaxMessage

CVSS 7.5 · High
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I. Basic Information for CVE-2026-77322

Vulnerability Information

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Vulnerability Title
SIPGO: DoS via unvalidated WebSocket frame length
Source: CVE Program / CVE List V5
Vulnerability Description
SIPGO is a library for writing SIP services in the GO language. Prior to 1.4.3, WSConnection.Read in sip/transport_ws.go creates a wsutil.Reader without setting MaxFrameSize, allowing NextFrame to accept a client-controlled header.Length before ParseMaxMessageLength is applied. An unauthenticated WS or WSS peer can send a frame header declaring an extremely large payload, causing an oversized allocation or a makeslice length panic before the payload is read and crashing or exhausting memory in the server process. This issue is fixed in version 1.4.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
emiago sipgo < 1.4.3 -

II. Public POCs for CVE-2026-77322

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III. Intelligence Information for CVE-2026-77322

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Other References for CVE-2026-77322 (3)

IV. Related Vulnerabilities

Same product: sipgo
Same vendor: emiago
Same weakness: CWE-789

V. Comments for CVE-2026-77322

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