pypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)
### 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 with a not terminated inline image, as done when extracting the page text for example. It only affects the ASCII85 and ASCIIHex filters. ### Patches This has been fixed in [pypdf==6.14.2](https://github.com/py-pdf/pypdf/releases/tag/6.14.2). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3892](https://github.com/py-pdf/pypdf/pull/3892).
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-59935US | high7.5 | — | ||
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.2, an attacker can craft a PDF with a page content stream containing a not terminated inline image that uses… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/py-pdf/pypdfPACKAGE
- https://github.com/py-pdf/pypdf/commit/5a33a46416aa1ae6c025ff90a3cca57631fdafd2WEB
- https://github.com/py-pdf/pypdf/pull/3892WEB
- https://github.com/py-pdf/pypdf/releases/tag/6.14.2WEB
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-g867-7843-wf8qWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-59935ADVISORY
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