Vulnerability in Urwid
CVE-2026-9323
The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically…
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Urwid — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-9323?
- CVE-2026-9323 is a high-severity vulnerability in Urwid, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.1/10. Published 2026-07-18.
- How severe is CVE-2026-9323?
- High severity. CVSS v3 base score is 8.1 out of 10.