CVE-2026-33981 Changedetection.io Discloses Environment Variables via jq env Builtin in Include Filters
An attacker can leak sensitive environment variables via jq include filters in changedetection.io, exposing secrets like passwords and proxy URLs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33981?
CVE-2026-33981 is a high-severity vulnerability in dgtlmoon changedetection.io, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
changedetection.io is a free open source web page change detection tool. Prior to 0.54.7, the `jq:` and `jqraw:` include filter expressions allow use of the jq `env` builtin, which reads all process environment variables and stores them as the watch snapshot. An authenticated user (or unauthenticated user when no password is set, the default) can leak sensitive environment variables including `SALTED_PASS`, `PLAYWRIGHT_DRIVER_URL`, `HTTP_PROXY`, and any secrets passed as env vars to the container. Version 0.54.7 patches the issue.
Weakness: CWE-200
Which versions are affected by CVE-2026-33981?
3 open source packages ship an affected version, including changedetection.io and changedetection-io. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
changedetection.io PyPI | All versions | 0.54.7 |
changedetection-io PyPI | All versions | 0.54.7 |
changedetection-io PyPI | All versions | 0.54.7 |
Products include Webtechnologies Changedetection.
How do I fix CVE-2026-33981?
Upgrade changedetection.io to 0.54.7 or later.
Is CVE-2026-33981 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33981 exists.
Other vulnerabilities in dgtlmoon changedetection.io
- CVE-2026-35490 changedetection.io has an Authentication Bypass via Decorator Ordering
- CVE-2026-29039 changedetection.io: XPath - Arbitrary File Read via unparsed-text()
- CVE-2026-29065 changedetection.io: Zip Slip vulnerability in the backup restore functionality
- CVE-2026-27696 changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs
- CVE-2026-41895 changedetection.io: XXE vulnerability in the changedetection.io project
Sources
Also known as GHSA-58r7-4wr5-hfx8, PYSEC-2026-2130.