Vulnerability · Published Sep 22, 2026 · Assigned by mitre
CVE-2026-79311
Medium 6.1
In plain English
A medium-severity cross-site scripting in the webpy package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 91.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
webpy web.py 0.76 is vulnerable to Cross Site Scripting (XSS) via render_jinja.__init__().
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | webpy | no fix listed | DEBIAN-CVE-2026-79311 |
| Debian:13 | webpy | no fix listed | DEBIAN-CVE-2026-79311 |
| Debian:14 | webpy | no fix listed | DEBIAN-CVE-2026-79311 |
| Ubuntu:26.04:LTS | webpy | no fix listed | UBUNTU-CVE-2026-79311 |
| Ubuntu:26.10 | webpy | no fix listed | UBUNTU-CVE-2026-79311 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N