CVE-2026-73051
6.3
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| actix | actix-web | 0 < 3.12.0 | affected |
| actix | actix-web | 3.12.0 | unaffected |
Weaknesses
- CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/actix/actix-web/security/advisories/GHSA-xhj4-vrgc-hr34
- https://www.vulncheck.com/advisories/actix-http-before-http-request-smuggling-via-cl-te
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