Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL_CVE-2026-40161

{
    "lastseen": "",
    "description": "Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. From 1.0.0 to 1.10.0, the Tekton Pipelines git resolver in API mode sends the system-configured Git API token to a user-controlled serverURL when the user omits the token parameter. A tenant with TaskRun or PipelineRun create permission can exfiltrate the shared API token (GitHub PAT, GitLab token, etc.) by pointing serverURL to an attacker-controlled endpoint.",
    "published": "2026-04-21T16:26:27.381Z",
    "modified": "2026-04-21T16:26:27.381Z",
    "type": "cve",
    "title": "Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL",
    "source": "GitHub_M",
    "references": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff\nhttps://github.com/tektoncd/pipeline/issues/9608\nhttps://github.com/tektoncd/pipeline/issues/9609",
    "id": "CVE-2026-40161",
    "bulletinFamily": "",
    "cwe": [
        "CWE-201"
    ],
    "cvelist": null,
    "sourceData": "tektoncd pipeline >= 1.0.0, <= 1.10.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "pipeline",
    "version": ">= 1.0.0, <= 1.10.0",
    "vendor": "tektoncd",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}