CVE-2026-27888 — Vulnerability intelligence
py-pdf — pypdf
Published:
- CVSS
- 6.6
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.