CVE-2026-41312 — pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being ex…
Published: 2026-04-22 · CVSS: 4.8 · 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 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7