CVE-2026-28351
MEDIUM WAF: Medium
CVSS 5.3
Published: 2026-02-27
CWE-400
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.
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 6.7.4 |
References
- github.com (Patch)
- github.com (Issue Tracking, Patch)
- github.com (Release Notes)
- github.com (Patch, Vendor Advisory)