CVE-2026-41312— pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
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I. Basic Information for CVE-2026-41312
Vulnerability Information
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Vulnerability Title
pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
Source: NVD (National Vulnerability Database)
Vulnerability Description
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的内存分配
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 6.10.2之前版本存在安全漏洞，该漏洞源于处理使用/FlateDecode压缩且/Predictor不等于1并具有大预测器参数的流时，可能导致内存耗尽。
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-2026-41312
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Same Patch Batch · py-pdf · 2026-04-22 · 4 CVEs total
| CVE-2026-41168 | pypdf has possible long runtimes for wrong size values in cross-reference and object strea | |
| CVE-2026-41313 | pypdf: Possible long runtimes for wrong size values in incremental mode | |
| CVE-2026-41314 | pypdf: Manipulated FlateDecode image dimensions can exhaust RAM |
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-2026-41168
pypdf has possible long runtimes for wrong size values in cr - CVE-2026-40260
pypdf: Manipulated XMP metadata entity declarations can exha - 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-2026-41168
pypdf has possible long runtimes for wrong size values in cr - CVE-2026-40260
pypdf: Manipulated XMP metadata entity declarations can exha - CVE-2026-33699
pypdf: Possible infinite loop during recovery attempts in Di
Same weakness: CWE-789
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