Denial of service (DoS) in github.com/pires/go-proxyproto
Priority LOW 36CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
The package github.com/pires/go-proxyproto before 0.6.0 are vulnerable to Denial of Service (DoS) via creating connections without the proxy protocol header.
Why it matters now
EPSS 0.01648 76th percentileScored 2026-11-07
Fix Fixed github.com/pires/go-proxyproto: 0.6.0github.com/pires/go-proxyproto (Go): 0.6.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | github.com/pires/go-proxyproto | before 0.6.0 | 0.6.0 | Patch available | CNA |
| — | github.com/pires/go-proxyproto (Go) | before 0.6.1 | 0.6.1 | Patch available | GHSA-xcf7-q56x-78gh |
- github.com/pires/go-proxyproto Vendor— Affected before 0.6.0 Fixed in 0.6.0 Patch available CNA
- github.com/pires/go-proxyproto (Go) Vendor— Affected before 0.6.1 Fixed in 0.6.1 Patch available GHSA-xcf7-q56x-78gh
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:go-proxyproto_project:go-proxyproto:*:*:*:*:*:*:*:* | before 0.6.0 | Vulnerable | Go-proxyproto Project |
- cpe:2.3:a:go-proxyproto_project:go-proxyproto:*:*:*:*:*:*:*:* Versions before 0.6.0 Vulnerable ·Go-proxyproto Project
Remediation
- Fix · CNA github.com/pires/go-proxyproto Fixed in 0.6.0
- Fix · GHSA-xcf7-q56x-78gh github.com/pires/go-proxyproto (Go) Fixed in 0.6.1 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-23409
- 2026-10-03 Alias added: GHSA-xcf7-q56x-78gh
References
Patch 2
Advisory 3
Other 6
- https://github.com/pires/go-proxyproto/issues/75
- https://github.com/pires/go-proxyproto/pull/76
- https://github.com/pires/go-proxyproto/commit/2e44d7a76a851d66890ab341403253afae5caac2
- https://github.com/pires/go-proxyproto
- https://github.com/pires/go-proxyproto/releases/tag/v0.6.1
- https://pkg.go.dev/vuln/GO-2022-0233
More Go-proxyproto Project Go-proxyproto vulnerabilities
- TI-2021-06047 Denial of service (DoS) in github.com/pires/go-proxyproto CVSS 3.1MEDIUM 4.9
Sources
- CVE-2021-23409 · CVE Program
- CVE-2021-23409 · NVD
- FIRST EPSS
- GHSA-xcf7-q56x-78gh · GitHub Advisory Database · CC BY 4.0
- CVE-2021-23409 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences