{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33949", "tracking": { "current_release_date": "2026-04-03T17:42:22.603404Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33949", "initial_release_date": "2026-03-30T17:42:04.922084Z", "revision_history": [ { "date": "2026-03-30T17:42:04.922084Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-30T17:42:12.366105Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-01T16:38:44.014380Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (1).| CWES updated (1)." }, { "date": "2026-04-01T16:38:46.591198Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-04-01T23:04:35.659508Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-04-01T23:04:38.012653Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-04-02T14:59:55.441422Z", "number": "7", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-02T14:59:57.402875Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-04-03T17:39:06.655024Z", "number": "9", "summary": "Unknown change." }, { "date": "2026-04-03T17:39:09.529604Z", "number": "10", "summary": "NCSC Score updated." } ], "status": "interim", "version": "10" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.2.2", "product": { "name": "vers:unknown/<2.2.2", "product_id": "CSAFPID-5975672" } } ], "category": "product_name", "name": "tinacms" } ], "category": "vendor", "name": "tinacms" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33949", "cwe": { "id": "CWE-22", "name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" }, "notes": [ { "category": "description", "text": "### Summary\nA Path Traversal vulnerability in `@tinacms/graphql` allows unauthenticated users to write and overwrite arbitrary files within the project root. This is achieved by manipulating the `relativePath` parameter in GraphQL mutations. The impact includes the ability to replace critical server configuration files and potentially execute arbitrary commands by sabotaging build scripts.\n\n### Details\nThe vulnerability exists in the path validation logic within `@tinacms/graphql`. Specifically, the regex-based validation in `getValidatedPath` fails to recognize backslashes (`\\`) as directory separators on non-Windows platforms (Mac/Linux). An attacker can provide a path like `x\\..\\..\\..\\package.json`, which bypasses the validation check but is subsequently treated as a traversal path during file I/O operations by the underlying `fs` modules and path normalization utilities.\n\nIncriminated code areas:\n- [packages/@tinacms/graphql/src/database/bridge/filesystem.ts](tinacms/packages/@tinacms/graphql/src/database/bridge/filesystem.ts): [assertWithinBase](tinacms/graphql/src/database/bridge/filesystem.ts#7-35) function.\n- [packages/@tinacms/graphql/src/resolver/index.ts](tinacms/packages/@tinacms/graphql/src/resolver/index.ts): `getValidatedPath` function.\n\n### PoC\n1. Start the TinaCMS development server.\n2. Send a malicious GraphQL mutation to overwrite a project file (e.g., [package.json](tinacms/examples/tina-self-hosted-demo/package.json)):\n\n```bash\ncurl -X POST http://localhost:4001/graphql \\\n -H \"Content-Type: application/json\" \\\n -d '{\"query\": \"mutation { updateDocument(collection: \\\"global\\\", relativePath: \\\"x\\\\\\\\..\\\\\\\\..\\\\\\\\..\\\\\\\\package.json\\\", params: { global: { header: { name: \\\"OVERWRITTEN\\\" } } }) { __typename } }\"}'\n```\n\n3. Observe that the root [package.json](tinacms/examples/tina-self-hosted-demo/package.json) has been replaced with the provided payload.\n\n\"2026-03-15_12-24-05 PM\"\n\n\"2026-03-15_12-27-33 PM\"\n\n### Impact\nThis is an **Arbitrary File Write** vulnerability. Any unauthenticated user with network access to the GraphQL API can:\n- Overwrite critical server configuration files (e.g., [package.json](tinacms/examples/tina-self-hosted-demo/package.json), [tsconfig.json](tinacms/examples/tina-self-hosted-demo/tsconfig.json)).\n- Host malicious scripts in the `public/` directory for client-side attacks.\n- Perform **Arbitrary Code Execution** by modifying build scripts or server-side logic files that are subsequently executed by the environment.\n\n\n\n**Weaknesses:**\n- **CWE-22**: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')\n- **CWE-73**: External Control of File Name or Path", "title": "github - https://api.github.com/advisories/GHSA-v9p7-gf3q-h779" }, { "category": "description", "text": "Tina is a headless content management system. Prior to version 2.2.2, a path traversal vulnerability in @tinacms/graphql allows unauthenticated users to write and overwrite arbitrary files within the project root. This is achieved by manipulating the relativePath parameter in GraphQL mutations. The impact includes the ability to replace critical server configuration files and potentially execute arbitrary commands by sabotaging build script. This issue has been patched in version 2.2.2.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33949.json" }, { "category": "description", "text": "Tina is a headless content management system. Prior to version 2.2.2, a path traversal vulnerability in @tinacms/graphql allows unauthenticated users to write and overwrite arbitrary files within the project root. This is achieved by manipulating the relativePath parameter in GraphQL mutations. The impact includes the ability to replace critical server configuration files and potentially execute arbitrary commands by sabotaging build script. This issue has been patched in version 2.2.2.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33949" }, { "category": "other", "text": "0.00125", "title": "EPSS" }, { "category": "other", "text": "3.7", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, Is related to (a version of) an uncommon product, There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5975672" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-v9p7-gf3q-h779" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33949.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33949" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-v9p7-gf3q-h779" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-v9p7-gf3q-h779" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5975672" ] } ], "title": "CVE-2026-33949" } ] }