CVE-2026-84310: CWE-405: Asymmetric Resource Consumption (Amplification) in py-pdf pypdf
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.
CVE-2026-84310: CWE-405: Asymmetric Resource Consumption (Amplification) in py-pdf pypdf
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.
CVSS v4.0
Score 4.8medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-01T16:17:43.079Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a973451acd9273b492939bc
Added to database: 09/01/2026, 20:23:45 UTC
Last updated: 09/02/2026, 01:51:05 UTC
Views: 7
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