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Vulnerability · Published Jul 8, 2026 · Assigned by GitHub_M

CVE-2026-59936pypdf: Possible infinite loop for not terminated inline images

High 8.7

In plain English

A high-severity uncontrolled resource consumption in pypdf from py-pdf. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.6%top 50.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12pypdfno fix listedDEBIAN-CVE-2026-59936
Debian:13pypdfno fix listedDEBIAN-CVE-2026-59936
Debian:14pypdf6.19.0-1DEBIAN-CVE-2026-59936
Debian:12pypdf2no fix listedDEBIAN-CVE-2026-59936
PyPIpypdf6.14.1GHSA-5xf7-4p34-54qr
PyPIpypdf6.14.1PYSEC-2026-3612
Ubuntu:24.04:LTSpypdfno fix listedUBUNTU-CVE-2026-59936
Ubuntu:25.10pypdfno fix listedUBUNTU-CVE-2026-59936
Ubuntu:26.04:LTSpypdfno fix listedUBUNTU-CVE-2026-59936
Ubuntu:26.10pypdfno fix listedUBUNTU-CVE-2026-59936
Ubuntu:22.04:LTSpypdf2no fix listedUBUNTU-CVE-2026-59936
Ubuntu:24.04:LTSpypdf2no fix listedUBUNTU-CVE-2026-59936

Affected products (as reported)

VendorProductVersions
py-pdf pypdf < 6.14.1

Weakness: CWE-400 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References