UBUNTU-CVE-2026-66752

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Source

https://ubuntu.com/security/CVE-2026-66752

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66752.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-66752

Upstream

CVE-2026-66752

Published

2026-07-28T16:20:00Z

Modified

2026-08-06T03:11:24Z

Severity

5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

tiny-http through 0.12.0 contains an HTTP request smuggling vulnerability that allows remote attackers to desynchronize request framing by sending a Transfer-Encoding header with any value, including non-chunked codings, which causes the library to unconditionally apply chunk-decoding and discard Content-Length. Attackers can exploit the discrepancy between tiny_http's improper Transfer-Encoding parsing and a correctly-implemented front-end proxy to produce two distinct interpretations of a single byte stream, enabling request smuggling, and can additionally send non-chunked bodies with non-chunked Transfer-Encoding values to cause failed body reads that tie up connections and consume worker threads without signaling errors to clients.

References

Affected packages

Ubuntu:24.04:LTS / rust-tiny-http

Package

Name: rust-tiny-http
Purl: pkg:deb/ubuntu/rust-tiny-http?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.12.0-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "librust-tiny-http-dev",
            "binary_version": "0.12.0-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66752.json"

Ubuntu:26.04:LTS / rust-tiny-http