pypdf vulnerable to inefficient decoding of ASCIIHexDecode streams

中危 5.3CVE-2026-28804 · GHSA-9m86-7pmv-2852 · PYSEC-2026-3014 · Published 06/03/2026 · updated 17/06/2026

要点

CVE-2026-28804 是影响 pypdf, pypdf (pypdf project) 的中危 (CVSS 5.3)漏洞。
未来 30 天内被利用的概率（EPSS）：0.44%，高于 38.6% 的漏洞。
修复：升级到 6.7.5 或更高版本。

Package	Affected versions	Patched versions
pypdf PyPI	`< 6.7.5`	`6.7.5`
pypdf pypdf_project	`< 6.7.5`	`6.7.5`

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter.

Patches

This has been fixed in pypdf==6.7.5.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3666.

NVD description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

References

py-pdf/pypdf security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-28804 · ADVISORY
py-pdf/pypdf#3666 · WEB
py-pdf/pypdf commit 648c627 · WEB
py-pdf/pypdf · PACKAGE
py-pdf/pypdf release 6.7.5 · WEB
pypi.org/project/pypdf · PACKAGE
GitHub Advisory GHSA-9m86-7pmv-2852 · ADVISORY

pypdf 的其他漏洞

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Package

Affected versions

Patched versions

pypdf

PyPI

< 6.7.5

6.7.5

pypdf

pypdf_project

< 6.7.5

6.7.5

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter.

Patches

This has been fixed in pypdf==6.7.5.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3666.

NVD description

pypdf 的其他漏洞

查看全部 →