CVE-2026-48735Medium▾ Sunlitpypdf: Manipulated XMP metadata streams can exhaust RAM
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Jul 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.1%
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements.
This has been fixed in pypdf==6.12.1.
If you cannot upgrade yet, consider applying the changes from PR #3796.
pypdf < 6.12.1Upgrade to a patched release:
pypdf 6.12.1Connected by shared product, vendor, weakness, or advisory.
GHSA-jm82-fx9c-mx94Mediumpypdf: Missing stream length values ignore defined limits
CVE-2026-82398Mediumpypdf is a free and open-source pure-python PDF library
CVE-2026-84309Mediumpypdf is a free and open-source pure-python PDF library
CVE-2026-84311Mediumpypdf is a free and open-source pure-python PDF library
CVE-2026-84310Mediumpypdf is a free and open-source pure-python PDF library
CVE-2026-71870Mediumpypdf is a free and open-source pure-python PDF library