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CVE-2026-73051medium6.3

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

Impact

Actix-http versions before 3.12.1 have an HTTP request smuggling vulnerability. Unauthenticated remote attackers can exploit this through a front-end intermediary. The vulnerability allows desynchronizing backend requests and smuggling malicious HTTP requests.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

actix · VulnCheck

actix-http

2 ranges
VulnCheck version evidence

Package identity

pkg:cargo/actix-httpExplore actix-http →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 3.12.1

semver versions

unaffected

3.12.1

semver versions

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-73051

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-444 ↗

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

VulnCheck

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

VulnCheck · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:actix:actix-http:*:*:*:*:*:rust:*:*

Before: 3.12.1

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:actix:actix-http:*:*:*:*:*:rust:*:*",
            "versionEndExcluding": "3.12.1"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-29
CISA-ADP

Additional data publisher

2026-08-14

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

References

2 sources
github.com/actix/actix-web/security/advisories/GHSA-xhj4-vrgc-hr34
vendor-advisoryVulnCheck
www.vulncheck.com/advisories/actix-http-before-http-request-smuggling-via-cl-te
third-party-advisoryVulnCheck