CVE-2026-119205：pypdf is a free and open-source pure-python PDF library. Prior to 6.21
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
漏洞详情
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
风险评估
- CVSS 评分：7.1（HIGH）
- 评分版本：CVSS 4.0
- 攻击向量：
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
弱点类型
CWE-835
参考链接
- https://github.com/py-pdf/pypdf/commit/f176db1a1f7f9af3e472e69a843ef1175653b044
- https://github.com/py-pdf/pypdf/pull/4288
- https://github.com/py-pdf/pypdf/releases/tag/6.21.4
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-mfr5-77xh-9j7h
数据来源：NVD（美国国家漏洞数据库），入库时按 CVSS 评分筛选。
原文链接： CVE-2026-119205：pypdf is a free and open-source pure-python PDF library. Prior to 6.21