CVE-2026-79310

Name	CVE-2026-79310
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
webpy (PTS)	bookworm	1:0.62-4+deb12u1	vulnerable
	trixie	1:0.62-6	vulnerable
	forky, sid	1:0.76-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
webpy	source	(unstable)	(unfixed)

Notes

[trixie] - webpy <no-dsa> (Minor issue)
[bookworm] - webpy <postponed> (Minor issue)
https://github.com/lichoin/TraceLoom/blob/main/CVEs/CVE-2026-79310.md