How severe is GHSA-j9wf-6r2x-hqmx?

No CVSS score has been assigned to GHSA-j9wf-6r2x-hqmx yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-j9wf-6r2x-hqmx?

GHSA-j9wf-6r2x-hqmx affects the following packages: github.com/centrifugal/centrifugo/v6 (Go). Ecosystems affected: Go.

How do I fix GHSA-j9wf-6r2x-hqmx?

Update github.com/centrifugal/centrifugo/v6 to 6.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j9wf-6r2x-hqmx is resolved across your whole dependency graph.

How do I detect GHSA-j9wf-6r2x-hqmx in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/centrifugal/centrifugo/v6, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-j9wf-6r2x-hqmx if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-j9wf-6r2x-hqmx actively exploited in the wild?

No public exploit code has been indexed for GHSA-j9wf-6r2x-hqmx yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-j9wf-6r2x-hqmx published, and has it been updated?

GHSA-j9wf-6r2x-hqmx was published on February 19, 2026 and was last updated on February 23, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

Centrifugo v6.6.0 dependency vulnerabilitiesGHSA-j9wf-6r2x-hqmx

GHSA-j9wf-6r2x-hqmx is a security vulnerability in github.com/centrifugal/centrifugo/v6. A fix is available for github.com/centrifugal/centrifugo/v6 — see the affected versions and patch details below.

Also known asGO-2026-4528

Published

Feb 19, 2026

Updated

Feb 23, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Feb 23, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐹github.com/centrifugal/centrifugo/v6

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Centrifugo v6.6.0 binary is compiled with Go 1.25.5 and
statically links github.com/quic-go/webtransport-go v0.9.0, having 7 known
CVEs

Go standard library — compiled with Go 1.25.5:

CVE	Severity	CVSS	Fixed In
CVE-2025-68121	CRITICAL	10.0	Go 1.25.7, 1.24.13
CVE-2025-61726	HIGH	7.5	Go 1.25.6, 1.24.12
CVE-2025-61728	MEDIUM	6.5	Go 1.25.6, 1.24.12
CVE-2025-61730	MEDIUM	5.3	Go 1.25.6, 1.24.12

Direct dependency github.com/quic-go/webtransport-go — pinned at v0.9.0 (go.mod line 34):

CVE	Severity	CVSS	Fixed In
CVE-2026-21434	MEDIUM	5.3	webtransport-go v0.10.0
CVE-2026-21435	MEDIUM	5.3	webtransport-go v0.10.0
CVE-2026-21438	MEDIUM	5.3	webtransport-go v0.10.0

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/centrifugal/centrifugo/v6`	all versions	6.6.1`go get github.com/centrifugal/centrifugo/v6@v6.6.1`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/centrifugal/centrifugo/v6, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/centrifugal/centrifugo/v6 to 6.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j9wf-6r2x-hqmx is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Summary Centrifugo v6.6.0 binary is compiled with **Go 1.25.5** and statically

O3 Security · Impact-Aware SCA

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