GHSA-cgf9-327m-v77c
pypdf: Possible large memory usage when parsing content streams
At a glance
- Published
- Updated
- CVE
- CVE-2026-113791
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing content streams with many small operations. ### Patches This has been fixed in [pypdf==6.21.0](https://github.com/py-pdf/pypdf/releases/tag/6.21.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4218](https://github.com/py-pdf/pypdf/pull/4218).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.21.0 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-113791 ADVISORY
- https://github.com/py-pdf/pypdf/pull/4218 WEB
- https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.21.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |