CVE-2026-22690 — pypdf has possible long runtimes for missing /Root object with large /Size values
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker w…
Published: 2026-01-10 · CVSS: 2.7 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7