CVE-2025-62708— pypdf manipulated LZWDecode streams can exhaust RAM
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I. Basic Information for CVE-2025-62708
Vulnerability Information
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Vulnerability Title
pypdf manipulated LZWDecode streams can exhaust RAM
Source: NVD (National Vulnerability Database)
Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
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 6.1.3之前版本存在安全漏洞，该漏洞源于解析使用LZWDecode过滤器的页面内容流时内存使用不当，可能导致内存消耗过大。
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-2025-62708
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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-2026-40260
pypdf: Manipulated XMP metadata entity declarations can exha
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-2026-40260
pypdf: Manipulated XMP metadata entity declarations can exha
Same weakness: CWE-409
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V. Comments for CVE-2025-62708
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