CVE-2026-102995
High
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPypdf
PublishedSep 30, 2026
First seenSep 30, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- pypdf_project pypdf6.18.1 or later
- pypdf6.18.1 or later
- py-pdf pypdf6.18.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pypdf_project pypdf | v < 6.18.1 | 6.18.1 |
| pypdfPyPI | v < 6.18.1 | 6.18.1 |
| py-pdf pypdf | v < 6.18.1 | 6.18.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.