CVE-2026-73051
actix-http before 3.12.1 HTTP Request Smuggling via CL.TE
- State
- Published
- Severity
- 6.3 Medium
- Published
- Aug 14, 2026
- Updated
- Oct 29, 2026
- Reserved
- Aug 10, 2026
Description
actix-http versions before 3.12.1 contain an HTTP request smuggling vulnerability in the HTTP/1.1 parser that accepts requests with both Content-Length and Transfer-Encoding: chunked headers. Unauthenticated remote attackers can exploit this through a front-end intermediary to desynchronize backend requests and smuggle malicious HTTP requests to the Actix service.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Products
| Product | Versions |
|---|---|
actix-httpactix |
|
References
- GitHub Security Advisory (GHSA-xhj4-vrgc-hr34)vendor-advisory
- VulnCheck Advisory: actix-http before 3.12.1 HTTP Request Smuggling via CL.TEthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.