Medium severity6.5NVD Advisory· Published Jun 30, 2026· Updated Jul 6, 2026
CVE-2026-57204
CVE-2026-57204
Description
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 products
2Patches
Vulnerability mechanics
References
2- github.com/py-pdf/pypdf/security/advisories/GHSA-jm82-fx9c-mx94nvdPatchVendor Advisory
- github.com/py-pdf/pypdf/releases/tag/6.13.3nvdProductRelease Notes
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