pypdf: Possible large memory usage when parsing content streams

보통 6.0CVE-2026-113791 · GHSA-cgf9-327m-v77c · Published 21/10/2026 · updated 22/10/2026

요약

CVE-2026-113791은(는) pypdf에 영향을 주는 보통 (CVSS 6.0) 취약점입니다.
향후 30일 내 악용 확률(EPSS): 0.39%, 전체 취약점의 33.3%보다 높음.
조치: 6.21.0 이상으로 업데이트하세요.

Package	Affected versions	Patched versions
pypdf PyPI	`< 6.21.0`	`6.21.0`

Description

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing content streams with many small operations.

Patches

This has been fixed in pypdf==6.21.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4218.

NVD description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

References

py-pdf/pypdf security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-113791 · ADVISORY
py-pdf/pypdf#4218 · WEB
py-pdf/pypdf commit 18bd298 · WEB
py-pdf/pypdf · PACKAGE
py-pdf/pypdf release 6.21.0 · WEB

pypdf의 다른 취약점

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Package

Affected versions

Patched versions

pypdf

PyPI

< 6.21.0

6.21.0