CVE-2026-79311 Cross-site scripting in n/a
Cross-site scripting vulnerability in web.py allows attackers to inject malicious scripts via the render_jinja initialization function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-79311?
CVE-2026-79311 is a medium-severity cross-site scripting vulnerability in n/a, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
webpy web.py 0.76 is vulnerable to Cross Site Scripting (XSS) via render_jinja.__init__().
Weakness: CWE-79
Which versions are affected by CVE-2026-79311?
How do I fix CVE-2026-79311?
No fix has been published for CVE-2026-79311 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-79311 being exploited?
There is no known exploitation of CVE-2026-79311 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-79311, GHSA-w73w-5qq6-73c8, UBUNTU-CVE-2026-79311.