Vulnerability Details CVE-2026-119205
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 23.2%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2026-119205
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cpe:2.3:a:py-pdf:pypdf:1.17.0
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cpe:2.3:a:py-pdf:pypdf:1.18.0
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cpe:2.3:a:py-pdf:pypdf:1.19.0
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cpe:2.3:a:py-pdf:pypdf:1.20.0
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cpe:2.3:a:py-pdf:pypdf:1.21.0
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cpe:2.3:a:py-pdf:pypdf:1.22.0
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cpe:2.3:a:py-pdf:pypdf:1.23.0
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cpe:2.3:a:py-pdf:pypdf:1.24.0
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cpe:2.3:a:py-pdf:pypdf:1.25.0
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cpe:2.3:a:py-pdf:pypdf:1.25.1
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cpe:2.3:a:py-pdf:pypdf:1.26.0
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cpe:2.3:a:py-pdf:pypdf:1.27.0
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cpe:2.3:a:py-pdf:pypdf:1.27.1
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cpe:2.3:a:py-pdf:pypdf:1.27.10
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cpe:2.3:a:py-pdf:pypdf:1.27.11
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cpe:2.3:a:py-pdf:pypdf:1.27.12
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cpe:2.3:a:py-pdf:pypdf:1.27.2
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cpe:2.3:a:py-pdf:pypdf:1.27.3
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cpe:2.3:a:py-pdf:pypdf:1.27.4
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cpe:2.3:a:py-pdf:pypdf:1.27.5
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cpe:2.3:a:py-pdf:pypdf:1.27.6
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cpe:2.3:a:py-pdf:pypdf:1.27.7
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cpe:2.3:a:py-pdf:pypdf:1.27.8
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cpe:2.3:a:py-pdf:pypdf:1.27.9
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cpe:2.3:a:py-pdf:pypdf:1.28.0
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cpe:2.3:a:py-pdf:pypdf:1.28.1
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cpe:2.3:a:py-pdf:pypdf:1.28.2
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cpe:2.3:a:py-pdf:pypdf:1.28.3
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cpe:2.3:a:py-pdf:pypdf:1.28.4
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cpe:2.3:a:py-pdf:pypdf:1.28.5
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cpe:2.3:a:py-pdf:pypdf:1.28.6
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cpe:2.3:a:py-pdf:pypdf:2.0.0
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cpe:2.3:a:py-pdf:pypdf:2.1.0
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cpe:2.3:a:py-pdf:pypdf:2.1.1
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cpe:2.3:a:py-pdf:pypdf:2.10.0
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cpe:2.3:a:py-pdf:pypdf:2.10.1
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cpe:2.3:a:py-pdf:pypdf:2.10.2
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cpe:2.3:a:py-pdf:pypdf:2.10.3
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cpe:2.3:a:py-pdf:pypdf:2.10.4
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cpe:2.3:a:py-pdf:pypdf:2.10.5
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cpe:2.3:a:py-pdf:pypdf:2.10.6
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cpe:2.3:a:py-pdf:pypdf:2.10.7
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cpe:2.3:a:py-pdf:pypdf:2.10.8
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cpe:2.3:a:py-pdf:pypdf:2.10.9
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cpe:2.3:a:py-pdf:pypdf:2.11.0
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cpe:2.3:a:py-pdf:pypdf:2.11.1
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cpe:2.3:a:py-pdf:pypdf:2.11.2
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cpe:2.3:a:py-pdf:pypdf:2.12.0
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cpe:2.3:a:py-pdf:pypdf:2.12.1
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cpe:2.3:a:py-pdf:pypdf:2.2.0
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cpe:2.3:a:py-pdf:pypdf:2.2.1
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cpe:2.3:a:py-pdf:pypdf:2.3.0
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cpe:2.3:a:py-pdf:pypdf:2.3.1
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cpe:2.3:a:py-pdf:pypdf:2.4.0
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cpe:2.3:a:py-pdf:pypdf:2.4.1
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cpe:2.3:a:py-pdf:pypdf:2.4.2
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cpe:2.3:a:py-pdf:pypdf:2.5.0
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cpe:2.3:a:py-pdf:pypdf:2.6.0
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cpe:2.3:a:py-pdf:pypdf:2.7.0
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cpe:2.3:a:py-pdf:pypdf:2.8.0
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cpe:2.3:a:py-pdf:pypdf:2.8.1
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cpe:2.3:a:py-pdf:pypdf:2.9.0
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cpe:2.3:a:py-pdf:pypdf:3.0.0
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cpe:2.3:a:py-pdf:pypdf:3.1.0
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cpe:2.3:a:py-pdf:pypdf:3.10.0
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cpe:2.3:a:py-pdf:pypdf:3.11.0
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cpe:2.3:a:py-pdf:pypdf:3.11.1
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cpe:2.3:a:py-pdf:pypdf:3.12.0
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cpe:2.3:a:py-pdf:pypdf:3.12.1
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cpe:2.3:a:py-pdf:pypdf:3.12.2
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cpe:2.3:a:py-pdf:pypdf:3.13.0
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cpe:2.3:a:py-pdf:pypdf:3.14.0
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cpe:2.3:a:py-pdf:pypdf:3.15.0
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cpe:2.3:a:py-pdf:pypdf:3.15.1
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cpe:2.3:a:py-pdf:pypdf:3.15.2
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cpe:2.3:a:py-pdf:pypdf:3.15.3
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cpe:2.3:a:py-pdf:pypdf:3.15.4
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cpe:2.3:a:py-pdf:pypdf:3.15.5
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cpe:2.3:a:py-pdf:pypdf:3.16.0
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cpe:2.3:a:py-pdf:pypdf:3.16.1
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cpe:2.3:a:py-pdf:pypdf:3.16.2
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cpe:2.3:a:py-pdf:pypdf:3.16.3
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cpe:2.3:a:py-pdf:pypdf:3.16.4
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cpe:2.3:a:py-pdf:pypdf:3.17.0
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cpe:2.3:a:py-pdf:pypdf:3.17.1
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cpe:2.3:a:py-pdf:pypdf:3.17.2
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cpe:2.3:a:py-pdf:pypdf:3.17.3
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cpe:2.3:a:py-pdf:pypdf:3.17.4
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cpe:2.3:a:py-pdf:pypdf:3.2.0
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cpe:2.3:a:py-pdf:pypdf:3.2.1
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cpe:2.3:a:py-pdf:pypdf:3.3.0
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cpe:2.3:a:py-pdf:pypdf:3.4.0
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cpe:2.3:a:py-pdf:pypdf:3.4.1
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cpe:2.3:a:py-pdf:pypdf:3.5.0
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cpe:2.3:a:py-pdf:pypdf:3.5.1
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cpe:2.3:a:py-pdf:pypdf:3.5.2
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cpe:2.3:a:py-pdf:pypdf:3.6.0
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cpe:2.3:a:py-pdf:pypdf:3.7.0
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cpe:2.3:a:py-pdf:pypdf:3.7.1
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cpe:2.3:a:py-pdf:pypdf:3.8.0
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cpe:2.3:a:py-pdf:pypdf:3.8.1
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cpe:2.3:a:py-pdf:pypdf:3.9.0
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cpe:2.3:a:py-pdf:pypdf:3.9.1
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cpe:2.3:a:py-pdf:pypdf:4.0.0
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cpe:2.3:a:py-pdf:pypdf:4.0.1
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cpe:2.3:a:py-pdf:pypdf:4.0.2
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cpe:2.3:a:py-pdf:pypdf:4.1.0
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cpe:2.3:a:py-pdf:pypdf:4.2.0
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cpe:2.3:a:py-pdf:pypdf:4.3.0
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cpe:2.3:a:py-pdf:pypdf:4.3.1
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cpe:2.3:a:py-pdf:pypdf:5.0.0
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cpe:2.3:a:py-pdf:pypdf:5.0.1
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cpe:2.3:a:py-pdf:pypdf:5.1.0
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cpe:2.3:a:py-pdf:pypdf:5.2.0
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cpe:2.3:a:py-pdf:pypdf:5.3.0
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cpe:2.3:a:py-pdf:pypdf:5.3.1
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cpe:2.3:a:py-pdf:pypdf:5.4.0
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cpe:2.3:a:py-pdf:pypdf:5.5.0
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cpe:2.3:a:py-pdf:pypdf:5.6.0
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cpe:2.3:a:py-pdf:pypdf:5.6.1
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cpe:2.3:a:py-pdf:pypdf:5.7.0
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cpe:2.3:a:py-pdf:pypdf:5.8.0
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cpe:2.3:a:py-pdf:pypdf:5.9.0
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cpe:2.3:a:py-pdf:pypdf:6.0.0
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cpe:2.3:a:py-pdf:pypdf:6.1.0
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cpe:2.3:a:py-pdf:pypdf:6.1.1
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cpe:2.3:a:py-pdf:pypdf:6.1.2
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cpe:2.3:a:py-pdf:pypdf:6.1.3
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cpe:2.3:a:py-pdf:pypdf:6.10.0
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cpe:2.3:a:py-pdf:pypdf:6.10.1
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cpe:2.3:a:py-pdf:pypdf:6.10.2
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cpe:2.3:a:py-pdf:pypdf:6.11.0
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cpe:2.3:a:py-pdf:pypdf:6.12.0
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cpe:2.3:a:py-pdf:pypdf:6.12.1
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cpe:2.3:a:py-pdf:pypdf:6.12.2
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cpe:2.3:a:py-pdf:pypdf:6.13.0
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cpe:2.3:a:py-pdf:pypdf:6.13.1
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cpe:2.3:a:py-pdf:pypdf:6.13.2
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cpe:2.3:a:py-pdf:pypdf:6.13.3
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cpe:2.3:a:py-pdf:pypdf:6.14.0
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cpe:2.3:a:py-pdf:pypdf:6.14.1
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cpe:2.3:a:py-pdf:pypdf:6.14.2
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cpe:2.3:a:py-pdf:pypdf:6.15.0
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cpe:2.3:a:py-pdf:pypdf:6.16.0
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cpe:2.3:a:py-pdf:pypdf:6.16.1
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cpe:2.3:a:py-pdf:pypdf:6.17.0
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cpe:2.3:a:py-pdf:pypdf:6.18.0
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cpe:2.3:a:py-pdf:pypdf:6.18.1
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cpe:2.3:a:py-pdf:pypdf:6.19.0
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cpe:2.3:a:py-pdf:pypdf:6.2.0
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cpe:2.3:a:py-pdf:pypdf:6.20.0
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cpe:2.3:a:py-pdf:pypdf:6.20.1
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cpe:2.3:a:py-pdf:pypdf:6.21.0
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cpe:2.3:a:py-pdf:pypdf:6.21.1
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cpe:2.3:a:py-pdf:pypdf:6.21.2
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cpe:2.3:a:py-pdf:pypdf:6.21.3
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cpe:2.3:a:py-pdf:pypdf:6.3.0
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cpe:2.3:a:py-pdf:pypdf:6.4.0
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cpe:2.3:a:py-pdf:pypdf:6.4.1
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cpe:2.3:a:py-pdf:pypdf:6.4.2
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cpe:2.3:a:py-pdf:pypdf:6.5.0
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cpe:2.3:a:py-pdf:pypdf:6.6.0
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cpe:2.3:a:py-pdf:pypdf:6.6.1
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cpe:2.3:a:py-pdf:pypdf:6.6.2
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cpe:2.3:a:py-pdf:pypdf:6.7.0
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cpe:2.3:a:py-pdf:pypdf:6.7.1
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cpe:2.3:a:py-pdf:pypdf:6.7.2
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cpe:2.3:a:py-pdf:pypdf:6.7.3
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cpe:2.3:a:py-pdf:pypdf:6.7.4
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cpe:2.3:a:py-pdf:pypdf:6.7.5
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cpe:2.3:a:py-pdf:pypdf:6.8.0
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cpe:2.3:a:py-pdf:pypdf:6.9.0
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cpe:2.3:a:py-pdf:pypdf:6.9.1
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cpe:2.3:a:py-pdf:pypdf:6.9.2