Vulnerability Description
RestrictedPython is a tool that helps define a subset of the Python language for accepting program input in a trusted environment. Prior to 8.4, RestrictedPython could allow a sandbox escape when a custom import policy or globals exposed the standard library string module, the string.Formatter class, a Formatter instance, or a Formatter subclass to restricted code. The string.Formatter methods format, get_field, get_value, and vformat performed attribute and item traversal internally without passing through RestrictedPython's safer_getattr protections. Restricted code could use those live object references to reach function globals, builtins, file access, or code execution primitives, affecting confidentiality, integrity, and availability in the host environment. This issue is fixed in version 8.4.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/zopefoundation/RestrictedPython/commit/3b47440070b91f8807c2b2
- https://github.com/zopefoundation/RestrictedPython/releases/tag/8.4
- https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-hp3v
FAQ
What is CVE-2026-76825?
CVE-2026-76825 is a vulnerability with a CVSS score of 8.4 (HIGH). RestrictedPython is a tool that helps define a subset of the Python language for accepting program input in a trusted environment. Prior to 8.4, RestrictedPython could allow a sandbox escape when a cu...
How severe is CVE-2026-76825?
CVE-2026-76825 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76825?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.