In short
- CVE-2026-59936 is a HIGH (CVSS 7.5) vulnerability affecting pypdf, pypdf (pypdf project).
- Chance of exploitation in the next 30 days (EPSS): 0.62%, higher than 49.7% of all vulnerabilities.
- Fix: update to 6.14.1 or later.
| Package | Affected versions | Patched versions |
|---|
| pypdf PyPI | < 6.14.1
| 6.14.1
|
| pypdf | < 6.14.1
| 6.14.1
|
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example.
Patches
This has been fixed in pypdf==6.14.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3891.
NVD description
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.
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