pypdf possibly loops infinitely when reading DCT inline images without EOF marker
### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. ### Patches This has been fixed in [pypdf==6.1.3](https://github.com/py-pdf/pypdf/releases/tag/6.1.3). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3501](https://github.com/py-pdf/pypdf/pull/3501).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-62707US | high7.5 | — | ||
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requi… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-vr63-x8vc-m265ADVISORY
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/f2864d6dd9bac7cecd3f4f54308b25ebbfa178f8WEB
- https://github.com/py-pdf/pypdf/pull/3501WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.1.3WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-vr63-x8vc-m265WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-62707ADVISORY
- https://pypi.org/project/pypdfPACKAGE
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