CVE-2026-28804

MEDIUM
2026-03-06 [email protected] GHSA-9m86-7pmv-2852
5.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
Patch Released
Mar 10, 2026 - 19:39 nvd
Patch available
CVE Published
Mar 06, 2026 - 07:16 nvd
MEDIUM 5.3

Tags

Python Pypdf

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.

Analysis

pypdf versions prior to 6.7.5 are vulnerable to denial-of-service attacks where specially crafted PDF files with ASCIIHexDecode filtered streams can cause excessive processing time and application hang. An unauthenticated attacker can exploit this by providing a malicious PDF that consumes significant computational resources when processed. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: 0

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CVE-2026-28804 vulnerability details – vuln.today
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