---
title: "CVE-2026-79310: webpy web.py - Server-Side Template Injection"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-79310/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-79310)

## 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](https://cwe.mitre.org/data/definitions/94.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-79310](https://nvd.nist.gov/vuln/detail/CVE-2026-79310)
- [https://github.com/lichoin/TraceLoom/blob/main/CVEs/CVE-2026-79310.md](https://github.com/lichoin/TraceLoom/blob/main/CVEs/CVE-2026-79310.md)
- [https://github.com/webpy/webpy](https://github.com/webpy/webpy)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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