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CVE-2026-28804

pypdf: Inefficient decoding of ASCIIHexDecode streams

Published: Mar 6, 2026Updated: Mar 6, 2026 Sources: CVE List NVD GHSA BDUCWE-407
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 67.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

pypdf vulnerable to inefficient decoding of ASCIIHexDecode streams

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LC:NI:NA:L
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
L
Open in CVSS calculator →

Weaknesses

CWE-407

Affected Products

PyPI
package-ecosystem
pypdf
OSS Libraries
py-pdf
package-ecosystemaka pypdf2, pypdf
pypdfOn-prem
OSS Libraries / pypi
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Matthew Peveler
aka pypdf2
PyPDF2Library
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-28804
nvd.nist.gov
https://github.com/py-pdf/pypdf/pull/3666
github.com
and 9 more references View all →

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