Is CVE-2026-77322 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77322 being exploited in the wild.

How severe is CVE-2026-77322?

High severity, with a CVSS score of 7.5, published 22 September 2026.

Which products and versions are affected?

github.com/emiago/sipgo (Go) <= 1.4.2, SEMVER:introduced=0,fixed=1.4.3.

Is there a fix for CVE-2026-77322?

Yes. github.com/emiago/sipgo (Go): upgrade to 1.4.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-77322 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-77322?

Check whether you run github.com/emiago/sipgo (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

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

Q: Is there a fix for CVE-2026-77322?

Yes. github.com/emiago/sipgo (Go): upgrade to 1.4.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-77322 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-77322?

Check whether you run github.com/emiago/sipgo (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77322 · Severity: high · CVSS 7.5 · Published 2026-09-22

SIPGO is a SIP protocol library used to build telephony and VoIP applications. A vulnerability in its WebSocket transport allows an unauthenticated attacker to crash the entire server process by sending a malformed WebSocket frame with an extremely large declared payload length. This causes immediate service outage and can be triggered repeatedly without authentication.

Technologies: github.com/emiago/sipgo (Go). Vendors: Go.

Quick answers

Is CVE-2026-77322 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77322 being exploited in the wild.
How severe is CVE-2026-77322?: High severity, with a CVSS score of 7.5, published 22 September 2026.
Which products and versions are affected?: github.com/emiago/sipgo (Go) <= 1.4.2, SEMVER:introduced=0,fixed=1.4.3.
Is there a fix for CVE-2026-77322?: Yes. github.com/emiago/sipgo (Go): upgrade to 1.4.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-77322 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-77322?: Check whether you run github.com/emiago/sipgo (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/emiago/sipgo (Go): upgrade to 1.4.3 or later
```
go get github.com/emiago/sipgo@v1.4.3
```

Technical details

The vulnerability exists in WSConnection.Read, which allocates a buffer based on the WebSocket frame header's declared length field before validating the value. The length field is client-controlled and can be up to 2^63-1 (signed 64-bit integer). When an attacker sends a frame declaring an excessively large length (e.g., 2^63-1), the make() call panics due to slice size limits. SIPGO does not recover from this panic, crashing the entire server process. The attack requires only network reachability and a completed WebSocket handshake; no authentication is needed. The fix is to set MaxFrameSize limits on the wsutil.NewReader call.

Affected products

SIPGO sipgo up to v1.4.0

Identifiers

CVE-2026-77322
GHSA-8h6x-h86x-75wh
GO-2026-6559

Timeline

2026-09-22: disclosed: GitHub advisory GHSA-8h6x-h86x-75wh published
2026: other: CVE-2026-77322 assigned

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