CVE-2026-119204：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 consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. 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 consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. 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-400

参考链接

• https://github.com/py-pdf/pypdf/commit/ea4ac663133f1b3de1d7a8f2e6fa239802fde79e
• https://github.com/py-pdf/pypdf/pull/4290
• https://github.com/py-pdf/pypdf/releases/tag/6.21.4
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-cggf-277g-3q54

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-2026-119204：pypdf is a free and open-source pure-python PDF library. Prior to 6.21