CVE-2026-49461Medium▾ Sunlitpypdf: Possible large memory usage for form XObjects during text extraction
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.1%
0.1% → 0.2%
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references.
This has been fixed in pypdf==6.12.2.
If you cannot upgrade yet, consider applying the changes from PR #3805.
pypdf < 6.12.2Upgrade to a patched release:
pypdf 6.12.2Connected by shared product, vendor, weakness, or advisory.
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