CVE-2026-27026
pypdf possibly has long runtimes for malformed FlateDecode streams
Summary
pypdf possibly has long runtimes for malformed FlateDecode 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. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. 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-2026-27026 pypdf
- Ubuntu UBUNTU-CVE-2026-27026 pypdf2
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- patch github.com
- web github.com