Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-40923— Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check

Quick assessment

Affected
tektoncd pipeline
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tekton Pipelines是Tekton开源的一个云原生管道。 Tekton Pipelines 1.11.1之前版本存在路径遍历漏洞，该漏洞源于VolumeMount路径限制存在验证绕过，允许通过..路径遍历组件将卷挂载到受限制的/tekton/内部路径下。

CVSS 5.4 · Medium EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 5

VendorProduct Version RangeStatus
tektoncd pipeline >= 1.0.0, < 1.0.2 affected
>= 1.2.0, < 1.3.4 affected
>= 1.4.0, < 1.6.2 affected
>= 1.7.0, < 1.9.3 affected
>= 1.10.0, < 1.11.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-40923

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
Source: CVE Program / CVE List V5
Vulnerability Description
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, a validation bypass in the VolumeMount path restriction allows mounting volumes under restricted /tekton/ internal paths by using .. path traversal components. The restriction check uses strings.HasPrefix without filepath.Clean, so a path like /tekton/home/../results passes validation but resolves to /tekton/results at runtime. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Tekton Pipelines 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tekton Pipelines是Tekton开源的一个云原生管道。 Tekton Pipelines 1.11.1之前版本存在路径遍历漏洞，该漏洞源于VolumeMount路径限制存在验证绕过，允许通过..路径遍历组件将卷挂载到受限制的/tekton/内部路径下。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tektoncd pipeline >= 1.0.0, < 1.0.2 -

II. Public POCs for CVE-2026-40923

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-40923

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-40923 (1)

Vendor Pages for CVE-2026-40923 (1)

Same Patch Batch · tektoncd · 2026-04-21 · 5 CVEs total

CVE-2026-40161 7.7 HIGH Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controll
CVE-2026-40938 7.5 HIGH Tekton Pipelines: Git Resolver Unsanitized Revision Parameter Enables git Argument Injecti
CVE-2026-25542 6.5 MEDIUM Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching
CVE-2026-40924 6.5 MEDIUM Tekton Pipelines: HTTP Resolver Unbounded Response Body Read Enables Denial of Service via

IV. Related Vulnerabilities

Same product: pipeline
Same vendor: tektoncd
Same weakness: CWE-22