PYSEC-2026-3012
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
At a glance
- Published
- Updated
- CVE
- CVE-2026-33699
- Aliases
- GHSA-87mj-5ggw-8qc3
- CVSS_V4
- 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
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. ### Patches This has been fixed in [pypdf==6.9.2](https://github.com/py-pdf/pypdf/releases/tag/6.9.2). ### Workarounds If users cannot upgrade yet, consider applying the changes from PR [#3693](https://github.com/py-pdf/pypdf/pull/3693).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.9.2 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-33699 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3693 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.9.2 WEB
- https://pypi.org/project/pypdf PACKAGE
- https://github.com/advisories/GHSA-87mj-5ggw-8qc3 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |