CVE-2026-3865 | Kubernetes up to 1.20.0 CSI Driver for SMB path traversal (Issue 138319)

VDB-356963 · CVE-2026-3865 · ISSUE 138319 KUBERNETES UP TO 1.20.0 CSI DRIVER FOR SMB PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $0-$5k 1.17- Summaryinfo A vulnerability was found in Kubernetes up to 1.20.0. It has been classified as critical. This affects an unknown part of the component CSI Driver for SMB. The manipulation leads to path traversal. This vulnerability is listed as CVE-2026-3865. There is no available exploit. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in Kubernetes up to 1.20.0 and classified as critical. This issue affects an unknown code block of the component CSI Driver for SMB. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-3865. The exploitation is known to be easy. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK. Upgrading to version 1.20.1 eliminates this vulnerability. Productinfo Type Virtualization Software Name Kubernetes Version 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20.0 License open-source Website Product: https://github.com/kubernetes/kubernetes/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Kubernetes 1.20.1 Timelineinfo 04/11/2026 Advisory disclosed 04/11/2026 +0 days VulDB entry created 04/11/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 138319 Status: Confirmed CVE: CVE-2026-3865 (🔒) GCVE (CVE): GCVE-0-2026-3865 GCVE (VulDB): GCVE-100-356963 Entryinfo Created: 04/11/2026 09:15 Changes: 04/11/2026 09:15 (53) Complete: 🔍 Cache ID: 99:076:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸