RUSTSEC-2026-0034

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0034

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0034.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0034

Aliases

Published

2026-03-04T12:00:00Z

Modified

2026-03-09T21:00:08Z

Severity

9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N CVSS Calculator

Summary

HTTP Request Smuggling via HTTP/1.0 and Transfer-Encoding Misparsing

Details

Pingora versions prior to 0.8.0 improperly allowed HTTP/1.0 request bodies to be close-delimited and incorrectly handled multiple Transfer-Encoding values. This allows an attacker to desync Pingora's request framing from backend servers and smuggle requests to the backend.

This vulnerability primarily affects standalone Pingora deployments in front of certain backends that accept HTTP/1.0 requests. An attacker could exploit this to bypass proxy-level ACL controls and WAF logic, poison caches and upstream connections, or perform cross-user attacks by hijacking sessions.

This flaw was corrected in commits 7f7166d62fa916b9f11b2eb8f9e3c4999e8b9023, 40c3c1e9a43a86b38adeab8da7a2f6eba68b83ad, and 87e2e2fb37edf9be33e3b1d04726293ae6bf2052 by correctly parsing message length headers per RFC 9112. Users should upgrade to Pingora >= 0.8.0.

Note: Cloudflare customers and Cloudflare's CDN infrastructure were not affected by this vulnerability, as its ingress proxy layers rejected ambiguous framing such as invalid Content-Length values and internally forwarded non-ambiguous message length framing headers.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / pingora-core

Package

Name: pingora-core; View open source insights on deps.dev
Purl: pkg:cargo/pingora-core

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.8.0

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "arch": [],
        "functions": [],
        "os": []
    }
}