pypdf has inefficient decoding of array-based streams

中危 6.5CVE-2026-33123 · GHSA-qpxp-75px-xjcp · PYSEC-2026-3023 · Published 20/03/2026 · updated 17/06/2026

要点

CVE-2026-33123 是影响 pypdf, pypdf (pypdf project) 的中危 (CVSS 6.5)漏洞。
未来 30 天内被利用的概率（EPSS）：0.36%，高于 29.3% 的漏洞。
修复：升级到 6.9.1 或更高版本。

Package	Affected versions	Patched versions
pypdf PyPI	`< 6.9.1`	`6.9.1`
pypdf pypdf_project	`< 6.9.1`	`6.9.1`

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and/or large memory usage. This requires accessing an array-based stream with lots of entries.

Patches

This has been fixed in pypdf==6.9.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3686.

NVD description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.

References

py-pdf/pypdf security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-33123 · ADVISORY
py-pdf/pypdf#3686 · WEB
py-pdf/pypdf · PACKAGE
py-pdf/pypdf release 6.9.1 · WEB
pypi.org/project/pypdf · PACKAGE
GitHub Advisory GHSA-qpxp-75px-xjcp · ADVISORY

pypdf 的其他漏洞

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Package

Affected versions

Patched versions

pypdf

PyPI

< 6.9.1

6.9.1

pypdf

pypdf_project

< 6.9.1

6.9.1

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and/or large memory usage. This requires accessing an array-based stream with lots of entries.

Patches

This has been fixed in pypdf==6.9.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3686.

NVD description

pypdf 的其他漏洞

查看全部 →