CVE-2026-40923

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Source
https://cve.org/CVERecord?id=CVE-2026-40923
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40923.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40923
Aliases
Downstream
CGA (327)
CLEANSTART (3)
openSUSE (1)
Related
Published
2026-04-21T20:50:53Z
Modified
2026-10-28T02:31:11Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40923.json"
}
References

Affected packages

Git / github.com/tektoncd/pipeline

Affected ranges

Type
GIT
Repo
https://github.com/tektoncd/pipeline
Events
Introduced
d9974e2cce817a43c69789161f0824e05a7572af
Fixed
0be1b6922f4e0f327cefd9832c974cb52b81971b
Introduced
18736c39fd59f37b9f82b8ff17f38e3fd10a3acd
Fixed
3826751c7f0433e5dda8f94ffb9aba2b82688289
Introduced
eaf7dc1dca3e314c26d14caff8207026a2dfade7
Fixed
99f573243e494b38c11dffde658867207f3992fe
Introduced
478d30f0a799663216cd225cf826e0b1efdadee3
Fixed
4b778d175176f80561df787f0b390a34b6904961
Introduced
9db88e0a3f072ade16ad0d88f1fd6a391281cf39
Fixed
5a882817386c72d545a7448b0793a758c0eba6b1
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "1.0.0"
                },
                {
                    "fixed": "1.0.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "1.2.0"
                },
                {
                    "fixed": "1.3.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "1.4.0"
                },
                {
                    "fixed": "1.6.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "1.7.0"
                },
                {
                    "fixed": "1.9.3"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "1.10.0"
                },
                {
                    "fixed": "1.11.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "original_tag": "v1.11.1",
            "range": [
                {
                    "fixed": "5a882817386c72d545a7448b0793a758c0eba6b1"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v1.*
v1.0.0
v1.0.1
v1.10.0
v1.11.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.4.0
v1.5.0
v1.6.0
v1.6.1
v1.7.0
v1.9.0
v1.9.1
v1.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40923.json"