Squid Request Smuggling in HTTP Transfer-Encoding (squid-cache squid)
En bref
- Source
- NVD
- EPSS
- EPSS 2.04 % · centile 81 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- GitHub_M
- Statut NVD
- Awaiting Analysis
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Description
Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (`src/HttpHeader.cc`) accepted the bare` Transfer-Encoding:` identity form, which the HTTP specification prohibits because any transfer coding must be wrapped within chunked encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used, bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients' future requests. This issue is fixed in version 7.6.
Faiblesses (CWE)
- CWE-444 — Dissimulation de requête ou de réponse HTTP
Références
- https://github.com/squid-cache/squid/security/advisories/GHSA-537g-4gfh-w7m6
- https://github.com/squid-cache/squid/pull/2427
- https://github.com/squid-cache/squid/pull/2431
- https://github.com/squid-cache/squid/commit/d06f48de8b8cc9a378cb91ecfe8e89b6e81696d2
- https://github.com/squid-cache/squid/commit/d808a7c825a70275113790471135c9c4d547ee51
- https://github.com/squid-cache/squid/releases/tag/SQUID_7_6
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N | GitHub_M |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N | NVD · security-advisories@github.com (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-98919
- GCVE · GCVE-0-2026-61642
Avis du CERT-FR
- CERTFR-2026-AVI-1168 — Multiples vulnérabilités dans Squid · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| squid-cache · squid | affected >= 3.3.0.1, < 7.6 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |