CVE-2026-27888 – pypdf: Manipulated FlateDecode XFA streams can exhaust RAM

CVE ID : CVE-2026-27888

Published : Feb. 26, 2026, 12:42 a.m. | 27 minutes ago

Description : 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.

Severity: 0.0 | NA

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