pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
Summary
pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
Original description
The description as published by the source.
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-27025 pypdf
- Ubuntu UBUNTU-CVE-2026-27025 pypdf2
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- patch github.com
- web github.com