Dashboard / CVE-2026-84311

CVE-2026-84311

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 35/100
Published: 2026-09-01 Modified: 2026-11-02 First seen: 2026-11-02 Status: active

Attack Surface

Low Complexity No Auth

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: None
VI: None
VA: Low

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
py-pdf pypdf < 6.16.1

References & Advisories (4)

Bug Bounty Relevance

35 / 100
✓ No authentication
✓ Low complexity

CVSS Score

4.8 / 10.0 v4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.14%
Raw Score 0.001350
Percentile 3.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00135
2026-11-12
0.00135
2026-11-10
0.00135
2026-11-09
0.00135
2026-11-08
0.00135
2026-11-07
0.00135
2026-11-06
0.00135
2026-11-05
0.00135
2026-11-04
0.00135
2026-11-03
0.00135
2026-11-02
0.00135

Intelligence Sources

nvd ref →

External Links