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.
Published: 2026-08-14
Score: 6.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Fri, 14 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
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.
Title actix-http before 3.12.1 HTTP Request Smuggling via CL.TE
First Time appeared Actix
Actix actix-web
Weaknesses CWE-444
CPEs cpe:2.3:a:actix:actix-web:*:*:*:*:*:rust:*:*
Vendors & Products Actix
Actix actix-web
References
Metrics cvssV4_0

{'score': 6.3, 'vector': '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'}

Subscriptions

Actix Actix-web
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T11:35:45.780Z

Reserved: 2026-08-10T19:10:18.100Z

Link: CVE-2026-73051

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-14T12:16:47.820

Modified: 2026-08-14T12:16:47.820

Link: CVE-2026-73051

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-444

    Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')