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TI-2026-51260 Aliases CVE-2026-73051GHSA-rh8q-rpf9-79v6

actix-http before 3.12.1 HTTP Request Smuggling via CL.TE

Priority LOW 29CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00566 47th percentileScored 2026-11-07
Fix Partial actix-http (actix): 3.12.1Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
actixactix-httpbefore 3.12.13.12.1Patch availableCNA
  • actix-http Vendoractix Affected before 3.12.1 Fixed in 3.12.1 Patch available CNA

Remediation

  • Fix · CNA actix-http (actix) Fixed in 3.12.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Update ServiceAffectedNo fix yet: Fix deferred
Not affected: 4 products
  • Confidential Compute Attestation
  • Red Hat Connectivity Link 1
  • Red Hat Hardened Images
  • Red Hat Trusted Profile Analyzer

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73051
  2. 2026-10-03 Alias added: GHSA-rh8q-rpf9-79v6
  3. 2026-10-29 Fix available: actix/[email protected] · CNA

References

Advisory 1

  • TI-2026-51039 actix-files before 0.6.10 Denial of Service via empty Range header CVSS 4.0MEDIUM 6.9
  • TI-2026-51040 actix-files before 0.6.10 Information Disclosure via Files CVSS 4.0MEDIUM 6.3
  • TI-2020-18345 An issue was discovered in the actix-codec crate before 0.3.0-beta.1 for Rust. CVSS 3.1CRITICAL 9.8
  • TI-2018-15253 An issue was discovered in the actix-web crate before 0.7.15 for Rust. CVSS 3.1CRITICAL 9.8
  • TI-2018-15252 An issue was discovered in the actix-web crate before 0.7.15 for Rust. CVSS 3.1CRITICAL 9.8
  • TI-2018-15251 An issue was discovered in the actix-web crate before 0.7.15 for Rust. CVSS 3.1CRITICAL 9.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences