CVE-2026-41168 — pypdf has possible long runtimes for wrong size values in cross-reference and object streams
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. T…
Published: 2026-04-22 · CVSS: 6.9 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7