Denial Of Service (DoS)

pypdf is vulnerable to Denial of Service DoS. The vulnerability is due to improper detection of inline image end markers in PDF page content streams, which allows an attacker to craft a malicious PDF that triggers an infinite loop during parsing and causes a denial of service...

UBUNTU-CVE-2026-28351

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaroun...