Low severity · published Oct 21, 2026
CVE-2026-113786
pypdf: Unvalidated JPEG image data loading
New
2.3
CVSS
0.4%
EPSS
No
On KEV
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pypdf · py-pdf
< 6.21.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-113786
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-113786
github.com
https://github.com/py-pdf/pypdf/commit/512d8eb94eb04be1d1c90504e6da2dcef8679e07
github.com
https://github.com/py-pdf/pypdf/pull/4222
github.com
https://github.com/py-pdf/pypdf/releases/tag/6.21.1
github.com
https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hx5-vpf9-5wcv
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