pypdf: Possible long runtimes with large amount of embedded files
### Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing the embedded files through the dictionary-based API. ### Patches This has been fixed in [pypdf==6.19.0](https://github.com/py-pdf/pypdf/releases/tag/6.19.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4081](https://github.com/py-pdf/pypdf/pull/4081).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-102999US | high7.5 | — | ||
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3WEB
- https://github.com/py-pdf/pypdf/pull/4081WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcjWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-102999ADVISORY
scry
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