CVE-2026-28351 — Manipulated RunLengthDecode streams can exhaust RAM
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 …
Published: 2026-02-27 · CVSS: 6.9 · CVSS 4.0
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 workaround, consider applying the changes from PR #3664.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7