CVE-2026-48156Low· 3.3▾ Sunlitpypdf: Possible long runtimes for zero-only width values in cross-reference streamsuntimes for zero-only width values in cross-reference streams
▾ Sunlit zone — Low / medium · no exploitation signal
impact 18.2 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.1%
Last analysed / modified upstream
low → medium
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An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values.
This has been fixed in pypdf==6.12.0.
If developers are unable to upgrade their apps immediately, they should consider applying the changes from PR #3791.
pypdf < 6.12.0Upgrade to a patched release:
pypdf 6.12.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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