Detections
Analytics

Echo: pypdf: security update to 6.16.1

medium Tenable Cloud Security Plugin ID 457455

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that
 causes pypdf/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed
 acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating
 exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is
 fixed in version 6.16.1. (CVE-2026-84311)

Solution

Update the pypdf library and its related packages to version 6.16.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-84311

Plugin Details

Severity: Medium

ID: 457455

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-84311

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 4.8

Threat Score: 1.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/3/2026

Vulnerability Publication Date: 9/1/2026

Reference Information

CVE: CVE-2026-84311