id: PYSEC-2026-1239
published: "2026-07-07T14:34:44.117909Z"
modified: "2026-07-07T17:23:53.733475Z"
aliases:
- CVE-2024-51998
- GHSA-6jrf-rcjf-245r
summary: changedetection.io path traversal using file URI scheme without supplying hostname
details: "### Summary\n\nThe validation for the file URI scheme falls short, and results in an attacker being able to read any file on the system. This issue only affects instances with a webdriver enabled, and `ALLOW_FILE_URI` false or not defined.\n\n### Details\n\nThe check used for URL protocol, `is_safe_url`, allows `file:` as a URL scheme:\n\nhttps://github.com/dgtlmoon/changedetection.io/blob/e0abf0b50507a8a3d0c1d8522ab23519b3e4cdf4/changedetectionio/model/Watch.py#L11-L13\n\nIt later checks if local files are permitted, but one of the preconditions for the check is that the URL starts with `file://`. The issue comes with the fact that the file URI scheme is not required to have double slashes.\n\n> A valid file URI must therefore begin with either `file:/path` (no hostname), `file:///path` (empty hostname), or `file://hostname/path`.\n> — [Wikipedia](https://en.wikipedia.org/wiki/File_URI_scheme#Number_of_slash_characters)\n\nhttps://github.com/dgtlmoon/changedetection.io/blob/e0abf0b50507a8a3d0c1d8522ab23519b3e4cdf4/changedetectionio/processors/__init__.py#L37-L41\n\n### PoC\n\n1. Open up a changedetection.io instance with a webdriver configured\n2. Create a new watch: `file:/etc/passwd` or a similar path for your operating system. Enable webdriver mode\n3. Wait for it to be checked\n4. Open preview\n5. Notice contents of the file\n"
affected:
- package:
    name: changedetection-io
    ecosystem: PyPI
    purl: pkg:pypi/changedetection-io
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 0.47.6
  versions:
  - 0.38.2
  - "0.39"
  - 0.39.1
  - 0.39.10
  - 0.39.10.post1
  - 0.39.10.post2
  - 0.39.11
  - 0.39.12
  - 0.39.13
  - 0.39.13.1
  - 0.39.14
  - 0.39.14.1
  - 0.39.15
  - 0.39.16
  - 0.39.17
  - 0.39.17.1
  - 0.39.17.2
  - 0.39.18
  - 0.39.19
  - 0.39.19.1
  - 0.39.2
  - 0.39.20
  - 0.39.20.1
  - 0.39.20.2
  - 0.39.20.3
  - 0.39.20.4
  - 0.39.21
  - 0.39.21.1
  - 0.39.22
  - 0.39.22.1
  - 0.39.3
  - 0.39.4
  - 0.39.5
  - 0.39.6
  - 0.39.7
  - 0.39.8
  - 0.39.9
  - 0.40.0
  - 0.40.0.1
  - 0.40.0.2
  - 0.40.0.3
  - 0.40.0.4
  - 0.40.1.0
  - 0.40.1.1
  - 0.40.2
  - 0.40.3
  - "0.41"
  - 0.41.1
  - "0.42"
  - 0.42.1
  - 0.42.2
  - 0.42.3
  - 0.43.1
  - 0.43.2
  - "0.44"
  - 0.44.1
  - "0.45"
  - 0.45.1
  - 0.45.11
  - 0.45.12
  - 0.45.13
  - 0.45.14
  - 0.45.15
  - 0.45.16
  - 0.45.17
  - 0.45.18
  - 0.45.19
  - 0.45.2
  - 0.45.20
  - 0.45.21
  - 0.45.22
  - 0.45.23
  - 0.45.24
  - 0.45.25
  - 0.45.26
  - 0.45.3
  - 0.45.4
  - 0.45.5
  - 0.45.6
  - 0.45.7
  - 0.45.7.1
  - 0.45.7.2
  - 0.45.7.3
  - 0.45.8
  - 0.45.8.1
  - 0.45.9
  - 0.46.0
  - 0.46.1
  - 0.46.2
  - 0.46.3
  - 0.46.4
  - 0.47.0
  - 0.47.1
  - 0.47.2
  - 0.47.3
  - 0.47.4
  - 0.47.5
references:
- type: WEB
  url: https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-6jrf-rcjf-245r
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2024-51998
- type: WEB
  url: https://github.com/dgtlmoon/changedetection.io/commit/49bc982c697169c98b79698889fb9d26f6b3317f
- type: PACKAGE
  url: https://github.com/dgtlmoon/changedetection.io
- type: WEB
  url: "https://github.com/dgtlmoon/changedetection.io/blob/e0abf0b50507a8a3d0c1d8522ab23519b3e4cdf4/changedetectionio/model/Watch.py#L11-L13"
- type: WEB
  url: "https://github.com/dgtlmoon/changedetection.io/blob/e0abf0b50507a8a3d0c1d8522ab23519b3e4cdf4/changedetectionio/processors/__init__.py#L37-L41"
- type: WEB
  url: https://github.com/dgtlmoon/changedetection.io/releases/tag/0.47.06
- type: PACKAGE
  url: https://pypi.org/project/changedetection-io
- type: ADVISORY
  url: https://github.com/advisories/GHSA-6jrf-rcjf-245r
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- type: CVSS_V4
  score: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N