Kubernetes up to 1.20.0 CSI Driver for SMB path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.41

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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

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

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔒

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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: 216:2CF:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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