CVE-2026-27888
HIGH WAF: Medium
CVSS 7.5
Published: 2026-02-26
CWE-400
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.
WAF Coverage Analysis
Uncontrolled Resource Consumption
Medium WAF Coverage
OWASP: A05:2021 Security Misconfiguration
912xxx - DOS Protection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| pypdf_project | pypdf | up to 6.7.3 |
References
- github.com (Patch)
- github.com (Issue Tracking, Patch)
- github.com (Product, Release Notes)
- github.com (Patch, Vendor Advisory)