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地图 / Unauthenticated ?q= search query causes exponential pyparsing backtracking under a process-global lock in Weblate

Unauthenticated ?q= search query causes exponential pyparsing backtracking under a process-global lock in Weblate

拒绝服务 / 资源消耗失控 / #3898281

厂商
Weblate
严重程度
中危
赏金
—
弱点
资源消耗失控
研究员
@type5afe
披露日期
2026-09-04
资产
https://github.com/WeblateOrg/weblate
CVE
—

该报告还没有中文解读。

原文摘录

摘自原文(5098 字符中的一小部分)
Weblate's search-query grammar (`weblate/utils/search.py:174-227`) is built with `pyparsing.infix_notation` over a term rule that is ambiguous at every position, and packrat memoization is never enabled. Parsing a query with nested parentheses therefore backtracks exponentially: cost grows ~4× per …
原文中的代码
git clone https://github.com/WeblateOrg/weblate
cd weblate && git checkout e3952598329d1e4f5e765260948e0c8384ddabe9
python3 -m venv venv && venv/bin/pip install 'pyparsing==3.3.2'   # pyproject.toml:190
venv/bin/python poc.py

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 Weblate 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @type5afe · 版权归作者与 Weblate 所有

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