CVE-2026-40260Medium· 5.3▾ Sunlitpypdf: Manipulated XMP metadata entity declarations can exhaust RAM
▾ 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 Jul 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.4%
Last analysed / modified upstream
0.4% → 0.5%
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata.
This has been fixed in pypdf==6.10.0.
If you cannot upgrade yet, consider applying the changes from PR #3724.
pypdf < 6.10.0Upgrade to a patched release:
pypdf 6.10.0Connected by shared product, vendor, weakness, or advisory.
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