Vulnerability · Published Sep 22, 2026 · Assigned by mitre
CVE-2026-79313
Critical 9.8
In plain English
A critical-severity security flaw 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 0.4% (higher than 32% of all known vulnerabilities).
Official description
webpy web.py 0.76 is vulnerable to Insufficient Session Expiration. The application's session management relies on periodic cleanup to expire sessions instead of checking the last-access time when a session is loaded. As a result, an expired session whose record has not yet been cleaned up can still be replayed and used, allowing an attacker holding a previously valid session cookie to continue accessing protected resources after the configured idle timeout.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | webpy | no fix listed | DEBIAN-CVE-2026-79313 |
| Debian:13 | webpy | no fix listed | DEBIAN-CVE-2026-79313 |
| Debian:14 | webpy | no fix listed | DEBIAN-CVE-2026-79313 |
| Ubuntu:26.04:LTS | webpy | no fix listed | UBUNTU-CVE-2026-79313 |
| Ubuntu:26.10 | webpy | no fix listed | UBUNTU-CVE-2026-79313 |
Affected products (as reported)
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H