High severity · published Jul 8, 2026
CVE-2026-59935
pypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a page content stream containing a not terminated inline image that uses the ASCII85 or ASCIIHex filters, causing an infinite loop during parsing such as when extracting page text. This issue is fixed in version 6.14.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pypdf · py-pdf
< 6.14.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59935
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59935
Patch
https://github.com/py-pdf/pypdf/commit/5a33a46416aa1ae6c025ff90a3cca57631fdafd2
Issue Tracking
https://github.com/py-pdf/pypdf/pull/3892
Product
https://github.com/py-pdf/pypdf/releases/tag/6.14.2
Patch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-g867-7843-wf8q
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