# CVE-2026-73051

## Summary

- **CVE ID:** CVE-2026-73051
- **Severity:** MEDIUM
- **CVSS Score:** 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)
- **CWE:** CWE-444
- **Published:** Aug 14, 2026
- **Last Modified:** Aug 14, 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.

## Affected Products

- actix — actix-web (0)
- actix — actix-web (3.12.0)

## References

- [CNA](https://github.com/actix/actix-web/security/advisories/GHSA-xhj4-vrgc-hr34)
- [CNA](https://www.vulncheck.com/advisories/actix-http-before-http-request-smuggling-via-cl-te)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 26.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._