pypdf: Possible large memory usage for form XObjects during text extraction
### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. ### Patches This has been fixed in [pypdf==6.12.2](https://github.com/py-pdf/pypdf/releases/tag/6.12.2). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3805](https://github.com/py-pdf/pypdf/pull/3805).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-49461US | medium5.5 | — | ||
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires e… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-j543-4vmf-qm7vADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/pull/3805WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.12.2WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-j543-4vmf-qm7vWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-49461ADVISORY
- https://pypi.org/project/pypdfPACKAGE
scry
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