CVE-2026-84311
4.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| py-pdf | pypdf | < 6.16.1 | affected |
Weaknesses
- CWE-834: CWE-834: Excessive Iteration
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-763m-79hh-57f2
- https://github.com/py-pdf/pypdf/pull/3966
- https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942
- https://github.com/py-pdf/pypdf/releases/tag/6.16.1
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