CVE-2026-57204

published 2026-06-30

CVE-2026-57204: pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can…

Priority P4 34 medium 6.9 CVSS 4.0

AV N AC L AT N PR N UI N VC N VI N VA L SC N SI N SA N E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
py-pdf	pypdf	< 6.13.3	6.13.3

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