CVE-2026-33699
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
EPSS 0.46%
Description
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
How to fix CVE-2026-33699
To remediate CVE-2026-33699, upgrade the affected package to a fixed version below.
- PyPI/pypdf—upgrade to 6.9.2 or later
- —upgrade to 6.9.2 or later
Is CVE-2026-33699 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 6.9.2
- from 0, < 6.9.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U |