CVE-2026-113795Medium· 6.0▾ Sunlitpypdf: Possible large memory usage for streams with multiple filters
▾ Sunlit zone — Low / medium · no exploitation signal
impact 33 · likelihood 0 · exploitation 0
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An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing any stream with a large amount of filters or multiple filters which pass around large amounts of data.
This has been fixed in pypdf==6.20.0.
If you cannot upgrade yet, consider applying the changes from PR #4173.
pypdf < 6.20.0Upgrade to a patched release:
pypdf 6.20.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-103000High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102996High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102995High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-102993High· 7.5pypdf is a free and open-source pure-python PDF library
CVE-2026-113790Medium· 6.0pypdf: Possible large memory usage when parsing arrays and dictionaries
CVE-2026-113791Medium· 6.0pypdf: Possible large memory usage when parsing content streams