CVE-2026-119203

pypdf: pypdf is a free and open-source pure-python PDF library

CVE-2026-119203 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-119203, released November 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0022
12th percentile

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.

Where it's fixed

ProductFixed inFixReleased
Linux
pypdf · Debian 14 6.21.4-1 DEBIAN-CVE-2026-119203 Nov 6, 2026
python-pypdf · opensuse-leap 16.0 6.19.0-bp160.3.1 OPENSUSE-SU-2026:22219-1 Nov 7, 2026

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