Dashboard / CVE-2026-59171

CVE-2026-59171

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 62/100
Published: 2026-11-06 Modified: 2026-11-12 First seen: 2026-11-06 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

JSON-java is a reference implementation of a JSON package in Java. From version 20150729 through 20260522, JSONTokener.nextSimpleValue can accumulate unbounded numeric tokens before JSONObject.stringToNumber passes them to BigInteger or BigDecimal conversion without a length limit. An application that parses attacker-controlled JSON or XML through JSONObject, JSONArray, or XML.toJSONObject can spend super-linear CPU time converting a sufficiently long numeric literal, blocking request-handling threads and causing denial of service. Strict mode and keep-strings settings in JSONParserConfiguration do not prevent the affected conversion path. Version 20260719 limits numeric conversion length.

Weakness Classification (2)

Affected Software (2)

VendorProductVersion
stleary JSON-java >= 20150729, < 20260719
stleary JSON-java >= 20150729, < 20260719

References & Advisories (7)

Bug Bounty Relevance

62 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

5.9 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.55%
Raw Score 0.005520
Percentile 46.7%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00552
2026-11-12
0.00552
2026-11-10
0.00552
2026-11-09
0.00552
2026-11-08
0.00552
2026-11-07
0.00552

Intelligence Sources

mitre ref →
nvd ref →

External Links