{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-77274",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-20T19:14:21.330Z",
        "datePublished": "2026-09-22T17:36:49.833Z",
        "dateUpdated": "2026-09-22T18:32:22.319Z"
    },
    "containers": {
        "cna": {
            "title": "MCP Atlassian: SSRF Protection Bypass",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-hgcf-4mq8-5266",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-hgcf-4mq8-5266"
                },
                {
                    "name": "https://github.com/sooperset/mcp-atlassian/pull/1448",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sooperset/mcp-atlassian/pull/1448"
                },
                {
                    "name": "https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460"
                },
                {
                    "name": "https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0"
                }
            ],
            "affected": [
                {
                    "vendor": "sooperset",
                    "product": "mcp-atlassian",
                    "versions": [
                        {
                            "version": "< 0.22.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-22T17:36:49.833Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, validate_url_for_ssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL authentication flow. A crafted URL can validate as an external hostname while the HTTP client connects to an internal host, permitting server-side requests to protected network resources. This issue is fixed in version 0.22.0."
                }
            ],
            "source": {
                "advisory": "GHSA-hgcf-4mq8-5266",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-hgcf-4mq8-5266",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-22T18:31:53.866509Z",
                                "id": "CVE-2026-77274",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-09-22T18:32:22.319Z"
                }
            }
        ]
    }
}