CVE-2026-84310
pypdf: Possible long runtimes/large memory usage when retrieving outlines
Description
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/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
No summary for this CVE yet.
Weaknesses
Affected Products
py-pdf
package-ecosystemaka pypdf2, pypdf
pypdfOn-prem
OSS Libraries / pypiExploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
1 technique Impact
References
https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942
github.com
https://github.com/py-pdf/pypdf/pull/3966
github.com
https://github.com/py-pdf/pypdf/releases/tag/6.16.1
github.com
and 1 more references View all →
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