CVE-2026-79310 Code injection in n/a
Attacker can execute arbitrary Python code and OS commands via server-side template injection in web.py when using a writable precompiled template directory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79310?
CVE-2026-79310 is a high-severity code injection vulnerability in n/a, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2026-79310?
How do I fix CVE-2026-79310?
No fix has been published for CVE-2026-79310 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-79310 being exploited?
There is no known exploitation of CVE-2026-79310 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-79310, GHSA-8m9w-mh94-cwr6, UBUNTU-CVE-2026-79310.