CVE-2026-79310 webpy web.py - Server-Side Template Injection

webpy web.py 0.76 contains a server-side template injection caused by sandbox bypass in precompiled template loader, letting attackers execute arbitrary Python code and OS commands remotely, exploit requires attacker to write to template directory.

CVSS base score 8.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.72% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server-Side Template Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest version with patched template engine or apply security patches to template loading mechanism.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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