PYSEC-2026-1827
pypdf has possible Infinite Loop when processing outlines/bookmarks
At a glance
- Published
- Updated
- CVE
- CVE-2026-24688
- Aliases
- GHSA-2q4j-m29v-hq73
- CVSS_V4
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. ### Patches This has been fixed in [pypdf 6.6.2](https://github.com/py-pdf/pypdf/releases/tag/6.6.2). ### Workarounds If projects cannot upgrade yet, consider applying the changes from PR [#3610](https://github.com/py-pdf/pypdf/pull/3610).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.6.2 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-24688 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3610 WEB
- https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.6.2 WEB
- https://pypi.org/project/pypdf PACKAGE
- https://github.com/advisories/GHSA-2q4j-m29v-hq73 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |