CVE-2026-49460

pypdf: Inefficient decoding of FlateDecode PNG predictor streams

CVSS 5.1 MEDIUMEPSS 0.1%CWE-407

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Productos afectados

py-pdf · pypdf

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Referencias

https://github.com/py-pdf/pypdf/pull/3806 https://github.com/py-pdf/pypdf/releases/tag/6.12.2 https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg