pyspur Incomplete Filtering of Special Elements allowed by SingleLLMCallNode function
A vulnerability was found in PySpur-Dev pyspur up to 0.1.18. It has been classified as critical. Affected is the function SingleLLMCallNode of the file backend/pyspur/nodes/llm/single_llm_call.py of the component Jinja2 Template Handler. The manipulation of the argument user_message leads to improper neutralization of special elements used in a template engine. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | pyspur | <= 0.1.18 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-6518
- https://github.com/PySpur-Dev/pyspur/issues/289
- https://github.com/PySpur-Dev/pyspur
- https://vuldb.com/?ctiid.313638
- https://vuldb.com/?id.313638
- https://vuldb.com/?submit.593612
- https://pypi.org/project/pyspur
- https://github.com/advisories/GHSA-8gff-cf92-72pv
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-791- Platform
- Python (PyPI)
- Package
pyspur- Disclosed
- 23.06.2025
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1844 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-8gff-cf92-72pv - CC BY 4.0
Vulnerability history: pyspur
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.