CVE-2026-40260— pypdf: Manipulated XMP metadata entity declarations can exhaust RAM
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I. Basic Information for CVE-2026-40260
Vulnerability Information
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Vulnerability Title
pypdf: Manipulated XMP metadata entity declarations can exhaust RAM
Source: NVD (National Vulnerability Database)
Vulnerability Description
pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. This issue has been fixed in version 6.10.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: NVD (National Vulnerability Database)
Vulnerability Title
pypdf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pypdf是py-pdf开源的一个免费开源的纯 python PDF 库。能够拆分、合并、裁剪和转换 PDF 文件的页面。 pypdf 6.10.0之前版本存在安全漏洞，该漏洞源于被操纵的XMP元数据实体声明可能耗尽RAM，可能导致内存使用过大。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40260
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IV. Related Vulnerabilities
Same product: pypdf
- CVE-2026-41314
pypdf: Manipulated FlateDecode image dimensions can exhaust - CVE-2026-41313
pypdf: Possible long runtimes for wrong size values in incre - CVE-2026-41312
pypdf: Manipulated FlateDecode predictor parameters can exha - CVE-2026-41168
pypdf has possible long runtimes for wrong size values in cr - CVE-2026-33699
pypdf: Possible infinite loop during recovery attempts in Di
Same vendor: py-pdf
- CVE-2026-41314
pypdf: Manipulated FlateDecode image dimensions can exhaust - CVE-2026-41313
pypdf: Possible long runtimes for wrong size values in incre - CVE-2026-41312
pypdf: Manipulated FlateDecode predictor parameters can exha - CVE-2026-41168
pypdf has possible long runtimes for wrong size values in cr - CVE-2026-33699
pypdf: Possible infinite loop during recovery attempts in Di
Same weakness: CWE-776
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Extensible Markup Language (XML) External Entity Injection (
V. Comments for CVE-2026-40260
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