Dashboard / CVE-2026-82398

CVE-2026-82398

MEDIUM
MEDIUM Priority: 0.04 BB Relevance: 74/100
Published: 2026-08-31 Modified: 2026-11-02 First seen: 2026-11-02 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

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

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, an attacker can craft a PDF that causes long runtimes when the pypdf/_utils.py function read_until_whitespace reads a stream containing a long run of bytes without whitespace. The function repeatedly performs immutable bytes concatenation in a one-byte loop, causing quadratic processing cost for the long non-whitespace input. This issue is fixed in version 6.15.0.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
py-pdf pypdf < 6.15.0

References & Advisories (4)

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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

0.52%
Raw Score 0.005240
Percentile 45.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00524
2026-11-12
0.00524
2026-11-10
0.00524
2026-11-09
0.00524
2026-11-08
0.00524
2026-11-07
0.00524
2026-11-06
0.00524
2026-11-05
0.00524
2026-11-04
0.00524
2026-11-03
0.00524
2026-11-02
0.00524

Intelligence Sources

nvd ref →

External Links