CVE-2026-55520
2026-08-28
20h18 +00:00
20h18 +00:00
特定のCVEの通知
特定のCVEの変更情報をいち早くお届けします。
CVE の説明
Protego is a pure-Python robots.txt parser with support for modern conventions. Prior to 0.6.2, protego._urlpattern._URLPattern._prepare_pattern_for_regex translates every asterisk in an Allow or Disallow directive into a lazy regular-expression wildcard, so a directive containing many asterisks creates exponential backtracking. After protego.Protego.parse processes a crafted robots.txt file, protego.Protego.can_fetch can spend an attacker-controlled period matching a near-miss URL and deny service to the crawler. The vulnerable path is src/protego/_urlpattern.py in the _URLPattern match logic. This issue is fixed in version 0.6.2.
CVE の情報
関連する弱点
| 弱点名 | 出典 | |
|---|---|---|
| Uncontrolled Resource Consumption The product does not properly control the allocation and maintenance of a limited resource. |
||
| Inefficient Regular Expression Complexity The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. |
