VDB-343101 · CVE-2026-24688 · Nessus 296930

py-pdf pypdf up to 6.6.1 Bookmarks infinite loop

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4.7	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in py-pdf pypdf up to 6.6.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Bookmarks. Performing a manipulation results in infinite loop. This vulnerability is identified as CVE-2026-24688. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in py-pdf pypdf up to 6.6.1. This affects an unknown part of the component Bookmarks. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. The summary by CVE is:

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-24688 since 01/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 296930 (Linux Distros Unpatched Vulnerability : CVE-2026-24688), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (296930) and CERT Bund (WID-SEC-2026-1730). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Xerox FreeFlow Print Server

Productinfo

Vendor

py-pdf

Name

pypdf

Version

Website

Product: https://github.com/py-pdf/pypdf/

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: 4.8
VulDB Meta Temp Score: 4.7

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

NVD Base Score: 4.3
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 296930
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-24688

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: pypdf 6.6.2

Timelineinfo

01/23/2026 CVE reserved
01/27/2026 +4 days Advisory disclosed
01/27/2026 +0 days VulDB entry created
05/31/2026 +124 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-24688 (🔒)
GCVE (CVE): GCVE-0-2026-24688
GCVE (VulDB): GCVE-100-343101
CERT Bund: WID-SEC-2026-1730 - Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Entryinfo

Created: 01/27/2026 20:56
Updated: 05/31/2026 14:49
Changes: 01/27/2026 20:56 (67), 01/28/2026 15:16 (2), 02/07/2026 03:43 (11), 02/26/2026 11:28 (5), 05/31/2026 14:49 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.