VDB-372794 · CVE-2026-49460 · GHSA-5hgr-hg42-57jg

py-pdf pypdf up to 6.12.1 algorithmic complexity

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.2	$0-$5k	0.81

Summaryinfo

A vulnerability, which was classified as problematic, was found in py-pdf pypdf up to 6.12.1. This issue affects some unknown processing. Such manipulation leads to algorithmic complexity. This vulnerability is traded as CVE-2026-49460. An attack has to be approached locally. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in py-pdf pypdf up to 6.12.1 and classified as problematic. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a algorithmic complexity vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-49460 since 05/30/2026. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 322250 (Linux Distros Unpatched Vulnerability : CVE-2026-49460), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch 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 vulnerability database at Tenable (322250). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 322250
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-49460

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: pypdf 6.12.2
Patch: github.com

Timelineinfo

05/30/2026 CVE reserved
06/23/2026 +24 days Advisory disclosed
06/23/2026 +0 days VulDB entry created
06/24/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5hgr-hg42-57jg
Status: Confirmed

CVE: CVE-2026-49460 (🔒)
GCVE (CVE): GCVE-0-2026-49460
GCVE (VulDB): GCVE-100-372794

Entryinfo

Created: 06/23/2026 07:01
Updated: 06/24/2026 15:38
Changes: 06/23/2026 07:01 (69), 06/24/2026 15:38 (2)
Complete: 🔍
Cache ID: 216::103

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