CVE WatchOct 21, 2026

CVE-2026-113794

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standar

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Oct 21, 2026 · Last modified: Oct 21, 2026 · CWE-835

EPSS · 30d

Not enough EPSS history yet.

Technical description

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

Official references

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———pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.1d