Kata Containers: CopyFile Policy Subversion via Symlinks (kata-containers kata-containers)

CVE-2026-41326

HIGH 8.2

En bref

Source: NVD
EPSS: EPSS 0.35 % · centile 28 (2026-11-01)
État: PUBLISHED
Publiée: 2026-04-24 18:46 UTC
Mise à jour: 2026-09-01 12:04 UTC
Attribuée par: GitHub_M
Statut NVD: Modified

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Description

Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.

Faiblesses (CWE)

CWE-61 — UNIX Symbolic Link (Symlink) Following
CWE-1220 — Insufficient Granularity of Access Control

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	HIGH 8.2	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N	GitHub_M
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	redhat-SADP
CVSS 4.0	HIGH 8.2	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/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 · security-advisories@github.com (Secondary)
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N	NVD · nvd@nist.gov (Primary)
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Avis

GHSA-q49m-57vm-c8cc — Kata Container has CopyFile Policy Subversion via Symlinks
GO-2026-5563 — Kata Container has CopyFile Policy Subversion via Symlinks in github.com/kata-containers/kata-containers

Références européennes

ENISA EUVD · EUVD-2026-25611
GCVE · GCVE-0-2026-41326

Avis du CERT-FR

CERTFR-2026-AVI-0781 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr

Configurations affectées (CPE NVD)

cpe:2.3:a:katacontainers:confidential_containers:*:*:*:*:*:*:*:* ≥ 0.9.0 < 0.20.0
cpe:2.3:a:katacontainers:kata_containers:*:*:*:*:*:*:*:* ≥ 3.4.0 < 3.29.0

Produits affectés

Produit	Versions
kata-containers · kata-containers	affected >= 3.4.0, < 3.29.0

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

⚠️ Kata Containers: CopyFile Policy Subversion via Symlinks (kata-containers kata-containers)