{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55158",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T15:13:28.165Z",
        "datePublished": "2026-09-15T14:47:58.804Z",
        "dateUpdated": "2026-09-17T14:42:35.993Z"
    },
    "containers": {
        "cna": {
            "title": "Conflibot: Command injection via crafted pull request branch names under pull_request_target",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-78",
                            "lang": "en",
                            "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 9.1,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/wktk/conflibot/security/advisories/GHSA-2qvg-qr73-mqxp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/wktk/conflibot/security/advisories/GHSA-2qvg-qr73-mqxp"
                },
                {
                    "name": "https://github.com/wktk/conflibot/pull/329",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wktk/conflibot/pull/329"
                },
                {
                    "name": "https://github.com/wktk/conflibot/commit/0107ac6a4575ea200d0b92287ea58f975be9505d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wktk/conflibot/commit/0107ac6a4575ea200d0b92287ea58f975be9505d"
                },
                {
                    "name": "https://github.com/wktk/conflibot/commit/59e255c49c920fd6b67471ab9ef3bf194439a3f2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wktk/conflibot/commit/59e255c49c920fd6b67471ab9ef3bf194439a3f2"
                },
                {
                    "name": "https://github.com/wktk/conflibot/releases/tag/v1.2.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wktk/conflibot/releases/tag/v1.2.1"
                },
                {
                    "name": "https://github.com/wktk/conflibot/releases/tag/v2.0.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wktk/conflibot/releases/tag/v2.0.0"
                }
            ],
            "affected": [
                {
                    "vendor": "wktk",
                    "product": "conflibot",
                    "versions": [
                        {
                            "version": "< 1.2.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-15T14:47:58.804Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Conflibot warns in advance when merging a pull request will cause conflicts in other open pull requests. Prior to 1.2.1, src/index.ts builds git checkout, git merge, and git format-patch commands by interpolating the attacker-controlled pull request head.ref value into strings passed to exec. In the documented pull_request_target configuration, an attacker can open a pull request, including from a fork, whose branch name contains shell metacharacters, and the workflow automatically interprets those characters as commands without maintainer interaction. The commands execute on a runner with base-repository secrets and a write-scoped GITHUB_TOKEN, allowing arbitrary command execution, secret or token exfiltration, unauthorized pushes, and other token abuse. The fixed implementations in src/index.ts and src/conflibot.ts use execFile or spawn argument arrays, and the v2 line also uses numeric pull-request refs rather than branch names. This issue is fixed in versions 1.2.1 and 2.0.0."
                }
            ],
            "source": {
                "advisory": "GHSA-2qvg-qr73-mqxp",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-17T14:42:13.306848Z",
                                "id": "CVE-2026-55158",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-17T14:42:35.993Z"
                }
            }
        ]
    }
}