{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55078",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T14:33:35.711Z",
        "datePublished": "2026-07-07T22:47:07.079Z",
        "dateUpdated": "2026-07-08T13:55:16.017Z"
    },
    "containers": {
        "cna": {
            "title": "Coder: Zip upload decompression lacks aggregate size limit, enabling denial of service",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-409",
                            "lang": "en",
                            "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "lang": "en",
                            "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/coder/coder/security/advisories/GHSA-2mg2-p7r7-g27f",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/coder/coder/security/advisories/GHSA-2mg2-p7r7-g27f"
                },
                {
                    "name": "https://github.com/coder/coder/pull/25877",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coder/coder/pull/25877"
                },
                {
                    "name": "https://github.com/coder/coder/releases/tag/v2.29.17",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coder/coder/releases/tag/v2.29.17"
                },
                {
                    "name": "https://github.com/coder/coder/releases/tag/v2.32.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coder/coder/releases/tag/v2.32.7"
                },
                {
                    "name": "https://github.com/coder/coder/releases/tag/v2.33.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coder/coder/releases/tag/v2.33.8"
                },
                {
                    "name": "https://github.com/coder/coder/releases/tag/v2.34.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/coder/coder/releases/tag/v2.34.2"
                }
            ],
            "affected": [
                {
                    "vendor": "coder",
                    "product": "coder",
                    "versions": [
                        {
                            "version": ">= 2.34.0, < 2.34.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.33.0, < 2.33.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.30.0, < 2.32.7",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.17.0, < 2.29.17",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-07T22:47:07.079Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.17.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `POST /api/v2/files` converts zip uploads to tar in memory via `CreateTarFromZip`, which enforced a per-entry size limit but no aggregate limit on total decompressed output, writing to an unbounded in-memory buffer. Exploitation requires authenticated file-upload access and the impact is limited to availability (denial of service). The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 adds a metadata preflight check that sums projected entry sizes and a streaming writer that enforces the aggregate limit during decompression. As a workaround, restrict file-upload permissions to trusted users or place a reverse proxy with request-body size limits in front of `coderd`."
                }
            ],
            "source": {
                "advisory": "GHSA-2mg2-p7r7-g27f",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-08T13:54:48.796364Z",
                                "id": "CVE-2026-55078",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-08T13:55:16.017Z"
                }
            }
        ]
    }
}