GHSA-fc8x-2rww-xw9m
pypdf: Inefficient handling of non-whitespace inputs in read_until_whitespace
At a glance
- Published
- Updated
- CVE
- CVE-2026-82398
- Aliases
- PYSEC-2026-3912
- CVSS_V4
- CVSS:4.0/AV:N/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 long runtimes. This requires a call to `read_until_whitespace` with an input which does not have whitespace for a long time. ### Patches This has been fixed in [pypdf==6.15.0](https://github.com/py-pdf/pypdf/releases/tag/6.15.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3947](https://github.com/py-pdf/pypdf/pull/3947).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.15.0 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-fc8x-2rww-xw9m WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-82398 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3947 WEB
- https://github.com/py-pdf/pypdf/commit/4959848e057e37c218dccad7465259210923faaa WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.15.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |