CVE-2026-27628 — pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires r…
Published: 2026-02-25 · CVSS: 1.2 · CVSS 4.0
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7