# CVE-2026-35000: ChangeDetection.io < 0.54.7 SafeXPath3Parser Bypass Arbitrary File Read

> Attackers can read arbitrary local files by bypassing the SafeXPath3Parser blocklist using unblocked XPath functions.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-x3f8-2w95-hw4m, PYSEC-2026-2131

## What is CVE-2026-35000?

CVE-2026-35000 is a high-severity path traversal vulnerability in dgtlmoon ChangeDetection.io, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ChangeDetection.io versions prior to 0.54.7 contain a protection bypass vulnerability in the SafeXPath3Parser implementation that allows attackers to read arbitrary local files by using unblocked XPath 3.0/3.1 functions such as json-doc() and similar file-access primitives. Attackers can exploit the incomplete blocklist of dangerous XPath functions to access sensitive data from the local filesystem.

Weakness: CWE-184 (Incomplete List of Disallowed Inputs)

## Which versions are affected by CVE-2026-35000?

1 open source package ship an affected version, including changedetection-io. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `changedetection-io` | PyPI | All versions | 0.54.7 |

Products: Webtechnologies Changedetection.

## How do I fix CVE-2026-35000?

Upgrade changedetection-io to 0.54.7 or later.

## Is CVE-2026-35000 being exploited?

There is no known exploitation of CVE-2026-35000 in the wild and no public exploit code.

## Other vulnerabilities in dgtlmoon ChangeDetection.io

- [CVE-2026-35490](https://insights.sbomify.com/CVE-2026-35490/): changedetection.io has an Authentication Bypass via Decorator Ordering (critical 9.8)
- [CVE-2026-29039](https://insights.sbomify.com/CVE-2026-29039/): changedetection.io: XPath - Arbitrary File Read via unparsed-text() (high 8.8)
- [CVE-2026-29065](https://insights.sbomify.com/CVE-2026-29065/): changedetection.io: Zip Slip vulnerability in the backup restore functionality (high 8.8)
- [CVE-2026-27696](https://insights.sbomify.com/CVE-2026-27696/): changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs (high 8.6)
- [CVE-2026-33981](https://insights.sbomify.com/CVE-2026-33981/): Changedetection.io Discloses Environment Variables via jq env Builtin in Include Filters (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-35000 and fix it if it is affected.

What it is: CVE-2026-35000 is a high-severity path traversal vulnerability in dgtlmoon ChangeDetection.io, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-35000 in the wild and no public exploit code.

Affected packages and fixed versions:
- changedetection-io (PyPI): affected all versions; fixed in 0.54.7

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-35000/ (Markdown: https://insights.sbomify.com/CVE-2026-35000/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-35000
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35000
- OSV: https://osv.dev/vulnerability/CVE-2026-35000

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-35000/
Summaries are generated and may contain mistakes; the official description above is the record.