Moderate severityNVD Advisory· Published Mar 6, 2026· Updated Mar 6, 2026
pypdf: Inefficient decoding of ASCIIHexDecode streams
CVE-2026-28804
Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pypdfPyPI | < 6.7.5 | 6.7.5 |
Affected products
4- ghsa-coords3 versionspkg:pypi/pypdfpkg:rpm/opensuse/python-PyPDF2&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-PyPDF2&distro=openSUSE%20Tumbleweed
< 6.7.5+ 2 more
- (no CPE)range: < 6.7.5
- (no CPE)range: < 2.11.1-bp160.3.1
- (no CPE)range: < 2.11.1-6.1
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-9m86-7pmv-2852ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-28804ghsaADVISORY
- github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98fghsax_refsource_MISCWEB
- github.com/py-pdf/pypdf/pull/3666ghsax_refsource_MISCWEB
- github.com/py-pdf/pypdf/releases/tag/6.7.5ghsax_refsource_MISCWEB
- github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852ghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.