CVE-2026-82398Medium· 5.3▾ Sunlitpypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 2.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
0.3% → 0.5%
— → 5.3
Last analysed / modified upstream
pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0.
pypdf < 6.15.0Upgrade past the affected range:
pypdf 6.15.0Affected packages:
pypdf < 6.15.0Patched in:
pypdf 6.15.0Source: https://github.com/advisories/GHSA-fc8x-2rww-xw9m
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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