GHSA-5423-jcjm-2gpv
Traefik affected by Go HTTP Request Smuggling Vulnerability
Summary
net/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x < 1.23.8
More Details: CVE-2025-22871
Patches
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
What each source reports
GitHub Advisories Score used
Traefik affected by Go HTTP Request Smuggling Vulnerability
Summary
net/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x < 1.23.8
More Details: CVE-2025-22871
Patches
- Record
GHSA-5423-jcjm-2gpv- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-1395
- Updated
- 2026-11-02
OSV
Traefik affected by Go HTTP Request Smuggling Vulnerability
Summary
net/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x < 1.23.8
More Details: CVE-2025-22871
Patches
- Record
GHSA-5423-jcjm-2gpv- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-1395
- Updated
- 2026-11-02
OSVGO-2025-3627No score
Traefik affected by Go HTTP Request Smuggling Vulnerability in github.com/traefik/traefik
Traefik affected by Go HTTP Request Smuggling Vulnerability in github.com/traefik/traefik
- Record
GO-2025-3627- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/traefik/traefik/v2Go | before 2.11.24 | 2.11.24 |
github.com/traefik/traefik/v3Go | before 3.3.6 | 3.3.6 |
github.com/traefik/traefik/v3Go | 3.4.0-rc1 to 3.4.0-rc1 | 3.4.0-rc2 |
github.com/traefik/traefik/v3Go | 3.4.0-rc1 up to 3.4.0-rc2 | 3.4.0-rc2 |
github.com/traefik/traefikGo | All versions | None known |
github.com/traefik/traefik/v3Go | before 3.3.6, 3.4.0-rc1 up to 3.4.0-rc2 | 3.3.63.4.0-rc2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-5423-jcjm-2gpv is a critical vulnerability (CVSS 9.1) in github.com/traefik/traefik, published April 18, 2025. No source lists public exploit code. Fixed in github.com/traefik/traefik/v2 2.11.24.
References
github.com/traefik/traefik/security/advisories/GHSA-5423-jcjm-2gpv
nvd.nist.gov/vuln/detail/CVE-2025-22871