pypdf: Manipulated XMP metadata entity declarations can exhaust RAM
### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the XMP metadata. ### Patches This has been fixed in [pypdf==6.10.0](https://github.com/py-pdf/pypdf/releases/tag/6.10.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3724](https://github.com/py-pdf/pypdf/pull/3724).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-40260US | medium5.3 | — | ||
pypdf is a free and open-source pure-python PDF library. In versions prior to 6.10.0, manipulated XMP metadata entity declarations can exhaust RAM. An attacker who exploits this vu… | ||||
02
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-3crg-w4f6-42mxADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/b15a374e5ca648d4878e57c3b2c0551e7f8cc7f8WEB
- https://github.com/py-pdf/pypdf/pull/3724WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.10.0WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-3crg-w4f6-42mxWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-40260ADVISORY
- https://pypi.org/project/pypdfPACKAGE
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