Medium severity · published Oct 21, 2026
CVE-2026-113795
pypdf: Possible large memory usage for streams with multiple filters
New
6.0
CVSS
0.5%
EPSS
No
On KEV
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, accessing a crafted PDF stream with a large number of filters or multiple filters that pass around large amounts of data can cause large memory consumption. This issue is fixed in version 6.20.0.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pypdf · py-pdf
< 6.20.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-113795
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-113795
github.com
https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185
github.com
https://github.com/py-pdf/pypdf/pull/4173
github.com
https://github.com/py-pdf/pypdf/releases/tag/6.20.0
github.com
https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f
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