CVE-2020-5236 describes a Denial of Service (DoS) vulnerability in Waitress version 1.4.2, affecting the agendaless waitress product. An attacker can exploit this by sending a single HTTP request with a malformed header containing invalid characters, causing the regular expression engine to catastrophically backtrack and consume 100% CPU, effectively taking the service offline. This vulnerability has a CVSS score of 6.5 (Medium) due to its network-based attack vector and high availability impact, though it requires low privileges and complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.4.2CPE matchmatch criteria | cpe:2.3:a:agendaless:waitress:1.4.2:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.