CVE-2026-79310

Published Sep 23, 2026 CVSS 3.1 · 8.5 High EPSS < 1% KEV · Not listed
Description
webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
First Time appeared Webpy
Webpy webpy
Vendors & Products Webpy
Webpy webpy
Type Values Removed Values Added
Title Server‑Side Template Injection in web.py 0.76 Enables Arbitrary Python and OS Code Execution
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Type Values Removed Values Added
Title Server‑Side Template Injection in web.py 0.76 Enables Arbitrary Python and OS Code Execution
Weaknesses CWE-94
Type Values Removed Values Added
Description webpy web.py 0.76 is vulnerable to server-side template injection (SSTI). The template engine can be tricked into executing attacker-controlled template code that built-in security checks are designed to reject. When an application precompiles templates from a directory the attacker can write to and later renders them through the precompiled template loader, the sandbox is bypassed and the attacker's code runs, resulting in arbitrary Python code execution and OS command execution on the server.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 23, 2026, 6:21 PM
Reserved
Aug 25, 2026, 12:00 AM
Status
Awaiting Analysis
Published
Sep 23, 2026, 4:16 PM
Modified
Sep 24, 2026, 9:08 PM