CVE-2026-40562

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Source
https://cve.org/CVERecord?id=CVE-2026-40562
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40562.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40562
Downstream
Published
2026-05-06T12:36:34Z
Modified
2026-10-21T02:57:13Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence
Details

Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence.

Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.

An attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.

Database specific 
{
    "cna_assigner":  "CPANSec",
    "cwe_ids":  [
        "CWE-444"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40562.json"
}
References

Affected packages

Git / github.com/kazeburo/gazelle

Affected ranges

Type
GIT
Repo
https://github.com/kazeburo/gazelle
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
ddf258777dbb2e75ce3a04fe3edc31768dabc48a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "0.49"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

0.*
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.11
0.12
0.20
0.21
0.22
0.23
0.25
0.30
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.42
0.43
0.44
0.45
0.46
0.47
0.48
0.49

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40562.json"