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CVE-2026-41314— pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

Quick assessment

Affected
py-pdf pypdf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于访问使用/FlateDecode且具有大尺寸值的图像时，可能导致内存耗尽。

AI Predicted 5.3 Difficulty: Easy EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-41314

Vulnerability Information
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Vulnerability Title
pypdf: Manipulated FlateDecode image dimensions can exhaust RAM
Source: CVE Program / CVE List V5
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 an image using `/FlateDecode` with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
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，该漏洞源于访问使用/FlateDecode且具有大尺寸值的图像时，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

Vendor Product Affected Versions CPE Subscribe
py-pdf pypdf < 6.10.2 -

II. Public POCs for CVE-2026-41314

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III. Intelligence Information for CVE-2026-41314

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Patches & Fixes for CVE-2026-41314 (1)

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-2026-41312 pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM

IV. Related Vulnerabilities

Same product: pypdf
Same vendor: py-pdf
Same weakness: CWE-789

V. Comments for CVE-2026-41314

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