Vulnerability · Published Sep 22, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity security flaw in sipgo from emiago. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 50.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/emiago/sipgo	1.4.3	GHSA-8h6x-h86x-75wh
Go	github.com/emiago/sipgo	1.4.3	GO-2026-6559

Affected products (as reported)

Vendor	Product	Versions
emiago	sipgo	< 1.4.3

Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/emiago/sipgo/security/advisories/GHSA-8h6x-h86x-75wh x_refsource_CONFIRM
https://github.com/emiago/sipgo/commit/769e4bc958376e2363566c8f7042202b410becdc x_refsource_MISC
https://github.com/emiago/sipgo/releases/tag/v1.4.3 x_refsource_MISC