CVE-2026-33140 — PySpector: Stored XSS in PySpector HTML Report Generation leads to Javascript Code Execution

2026-10-02T09:15:12.704503+00:00

Affected: ParzivalHack PySpector

PySpector is a static analysis security testing (SAST) Framework engineered for modern Python development workflows. PySpector versions 0.1.6 and prior are affected by a stored Cross-Site Scripting (XSS) vulnerability in the HTML report generator. When PySpector scans a Python file containing JavaScript payloads (i.e. inside a string passed to eval() ), the flagged code snippet is interpolated into the HTML report without sanitization. Opening the generated report in a browser causes the embedded JavaScript to execute in the browser's local file context. This issue has been patched in version 0.1.7.

GHSA-2gmv-2r3v-jxj2 — Stored XSS in PySpector HTML Report Generation leads to Javascript Code Execution

2026-10-02T09:15:12.704788+00:00

Affected: PyPI: pyspector

### Summary PySpector versions `<= 0.1.6` are affected by a stored Cross-Site Scripting (XSS) vulnerability in the HTML report generator. When PySpector scans a Python file containing JavaScript payloads (i.e. inside a string passed to `eval()` ), the flagged code snippet is interpolated into the HTML report without sanitization. Opening the generated report in a browser causes the embedded JavaScript to execute in the browser's local file context.

### Impact An attacker can craft a malicious Python file (for example, hosted in a public repository), designed to be scanned by PySpector. When a victim scans this file and opens the resulting HTML report, arbitrary JavaScript executes in their browser. While the `file://` context limits the attacker's ability to exfiltrate cookies or make credentialed requests, the following is still achievable: - Arbitrary DOM manipulation - Redirects to attacker-controlled pages - Theft of locally accessible data via `fetch()` or `XMLHttpRequest` to `file://` paths (browser-dependent)

Any user of PySpector who scans untrusted code and generates HTML reports, is potentially affected.

### PoC

The following steps reproduce the vulnerability on PySpector `<= 0.1.6`: 1. Create a malicious Python file containing a JavaScript payload embedded in a string argument to `eval()`, and run PySpector against the file, generating an HTML report:

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CVE-2026-33140 — PySpector: Stored XSS in PySpector HTML Report Generation leads to Javascript Code Execution

GHSA-2gmv-2r3v-jxj2 — Stored XSS in PySpector HTML Report Generation leads to Javascript Code Execution