{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-52811",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-08T18:11:06.659Z",
        "datePublished": "2026-06-24T20:31:38.233Z",
        "dateUpdated": "2026-06-26T03:55:39.455Z"
    },
    "containers": {
        "cna": {
            "title": "Gogs: UploadRepoFiles writes outside repo working tree via committed parent sym",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-59",
                            "lang": "en",
                            "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-61",
                            "lang": "en",
                            "description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "baseScore": 9,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m"
                },
                {
                    "name": "https://github.com/gogs/gogs/pull/8332",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gogs/gogs/pull/8332"
                },
                {
                    "name": "https://github.com/gogs/gogs/commit/04cb8afbb01d855454e59977a1cdbf522ea1db31",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gogs/gogs/commit/04cb8afbb01d855454e59977a1cdbf522ea1db31"
                },
                {
                    "name": "https://github.com/gogs/gogs/releases/tag/v0.14.3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gogs/gogs/releases/tag/v0.14.3"
                }
            ],
            "affected": [
                {
                    "vendor": "gogs",
                    "product": "gogs",
                    "versions": [
                        {
                            "version": "< 0.14.3",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-24T20:31:38.233Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component — UploadRepoFiles is the lone outlier. An attacker with repo-write access plus a multipart upload whose filename contains a literal backslash (preserved by filepath.Base on Linux, then converted to / by pathx.Clean) redirects the write through a previously-committed directory symlink. iox.CopyFile opens the destination with os.Create (no O_NOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorized_keys → SSH foothold, or <repo>.git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3."
                }
            ],
            "source": {
                "advisory": "GHSA-89mr-xqfv-758m",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-25T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-52811"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-26T03:55:39.455Z"
                }
            }
        ]
    }
}