py-pdf/pypdf · Security
pypdf: Possible large memory usage for form XObjects during text extraction
- GHSA ID
- GHSA-j543-4vmf-qm7v
- CVE ID
- CVE-2026-49461
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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 extracting the text of a page which contains a form XObject with self-references.
Patches
This has been fixed in pypdf==6.12.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3805.
CWEs
- CWE-400 · Uncontrolled Resource Consumption