py-pdf pypdf up to 6.7.4 ASCIIHexDecode algorithmic complexity

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in py-pdf pypdf up to 6.7.4. The affected element is an unknown function. The manipulation of the argument ASCIIHexDecode results in algorithmic complexity. This vulnerability is known as CVE-2026-28804. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in py-pdf pypdf up to 6.7.4. Affected is an unknown code block. The manipulation of the argument ASCIIHexDecode with an unknown input leads to a algorithmic complexity vulnerability. CWE is classifying the issue as CWE-407. An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-28804 since 03/03/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 301404 (Linux Distros Unpatched Vulnerability : CVE-2026-28804), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.7.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 648c627d2657447dfb1773412af05a0a5103b98f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (301404) and CERT Bund (WID-SEC-2026-1730). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Xerox FreeFlow Print Server

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Algorithmic complexity
CWE: CWE-407 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301404
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-28804

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: pypdf 6.7.5
Patch: 648c627d2657447dfb1773412af05a0a5103b98f

Timelineinfo

03/03/2026 CVE reserved
03/06/2026 +3 days Advisory disclosed
03/06/2026 +0 days VulDB entry created
06/01/2026 +87 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-9m86-7pmv-2852
Status: Confirmed

CVE: CVE-2026-28804 (🔒)
GCVE (CVE): GCVE-0-2026-28804
GCVE (VulDB): GCVE-100-349410
CERT Bund: WID-SEC-2026-1730 - Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Entryinfo

Created: 03/06/2026 08:39
Updated: 06/01/2026 04:14
Changes: 03/06/2026 08:39 (71), 03/07/2026 13:52 (2), 03/12/2026 01:40 (11), 06/01/2026 04:14 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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