CVE-2026-93750

http-cache-semantics through 4.2.0 Cross-Client Cache Disclosure via Vary Wildcard

En bref

Sévérité: HIGH 8.2
EPSS: EPSS 0.45 % · centile 39 (2026-10-27)
État: PUBLISHED
Publiée: 2026-09-18
Mise à jour: 2026-09-24
Attribuée par: VulnCheck
Statut NVD: Deferred

Description

http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyMatches() function that fails to properly validate Vary header wildcards due to byte-for-byte string comparison. Attackers can request URLs previously fetched by other clients to receive cached responses intended for different users, disclosing sensitive information across clients.

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 8.2	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	VulnCheck
CVSS 4.0	HIGH 8.2	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	NVD · disclosure@vulncheck.com (Primary)

Faiblesses (CWE)

CWE-436

Références européennes

ENISA EUVD · EUVD-2026-83255
GCVE · GCVE-0-2026-93750

Avis du CERT-FR

CERTFR-2026-AVI-1378 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
kornelski · http-cache-semantics	affected 0 ≤ 4.2.0

Références

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