pypdf: Manipulated XMP metadata streams can exhaust RAM
### Impact 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. ### Patches This has been fixed in [pypdf==6.12.1](https://github.com/py-pdf/pypdf/releases/tag/6.12.1). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3796](https://github.com/py-pdf/pypdf/pull/3796).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-48735US | medium5.5 | — | ||
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires p… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-wjqc-6w8f-h24cADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/pull/3796WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.12.1WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjqc-6w8f-h24cWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-48735ADVISORY
- https://pypi.org/project/pypdfPACKAGE
scry
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