CVE-2026-48735: pypdf: Manipulated XMP metadata streams can exhaust RAM

June 16, 2026

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.

References

github.com/advisories/GHSA-wjqc-6w8f-h24c
github.com/py-pdf/pypdf/pull/3796
github.com/py-pdf/pypdf/releases/tag/6.12.1
github.com/py-pdf/pypdf/security/advisories/GHSA-wjqc-6w8f-h24c
nvd.nist.gov/vuln/detail/CVE-2026-48735

Code Behaviors & Features

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