CVE-2026-28351

MEDIUM
2026-02-27 [email protected] GHSA-f2v5-7jq9-h8cg
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 - 21:55 vuln.today
Patch Released
Mar 03, 2026 - 18:36 nvd
Patch available
CVE Published
Feb 27, 2026 - 21:16 nvd
MEDIUM 5.3

Tags

Python Pypdf Redhat Suse

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

Analysis

Crafted PDF files can trigger excessive memory consumption in pypdf versions before 6.7.4 when processing content streams with the RunLengthDecode filter, enabling denial-of-service attacks against applications using the library. An unauthenticated attacker can exploit this remotely by submitting a malicious PDF, causing the affected application to exhaust system memory. …

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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: +0.1
CVSS: +26
POC: 0

Vendor Status

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CVE-2026-28351 vulnerability details – vuln.today
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