CVE-2026-25527
Mediumchangedetection.io vulnerable to unauthenticated static path traversal
Published Feb 19, 2026 · Updated Aug 12, 2026 · Also known as GHSA-9jj8-v89v-xjvw, PYSEC-2026-2124
Key Facts
Routine patching- CVE-2026-25527 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting Changedetection (Webtechnologies), changedetection-io (pypi), changedetection.io (pypi).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 1.0% probability of exploitation in the next 30 days.
- Fixed versions are available, including changedetection-io 0.53.2, changedetection.io 0.53.2, Changedetection 0.53.2.
- Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
1.0%
Higher than 62.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
changedetection.io is a free open source web page change detection tool. In versions prior to 0.53.2, the /static// route accepts group="..", which causes send_from_directory("static/..", filename) to execute. This moves the base directory up to /app/changedetectionio, enabling unauthenticated local file read of application source files (e.g., flask_app.py). Version 0.53.2 fixes the issue.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ChangedetectionWebtechnologies | See advisory | 0.53.2 |
| changedetection-iopypi | See advisory | 0.53.2 |
| changedetection.iopypi | >= < 0.53.2 | 0.53.2 |
Patched Releases
changedetection-io
0.53.2
changedetection.io
0.53.2
Changedetection
0.53.2
Timeline
Publicly disclosed
Feb 19, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25527.json
- advisoryhttps://github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2026-2124.yaml
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-25527
- otherhttps://github.com/dgtlmoon/changedetection.io
FAQ
Common Questions.
changedetection.io is a free open source web page change detection tool.
Affected: Changedetection (Webtechnologies); changedetection-io (pypi); changedetection.io (pypi) versions >= < 0.53.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including changedetection-io 0.53.2, changedetection.io 0.53.2, Changedetection 0.53.2.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
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