8.7

CVE-2026-102461: eclipse foundation eclipse vert.x Inefficient Algorithmic Complexity

CVSS: 8.7v4.0HighUndergoing analysis
Published 15-10-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-102461 is a high (CVSS 8.7) Inefficient Algorithmic Complexity vulnerability in eclipse foundation eclipse vert.x. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.40%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-10-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the uniqueItems keyword validation uses an O(n²) pairwise comparison loop with no short-circuit or size limit. A remote unauthenticated attacker can submit a moderately-sized JSON array that consumes disproportionate CPU time, leading to denial of service. The impacted component is io.vertx:vertx-json-schema. The following Vert.x modules depend on vertx-json-schema and are also affected: io.vertx:vertx-web-openapi-router io.vertx:vertx-web-validation io.vertx:vertx-openapi

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202619-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Eclipse foundation1 product
  • eclipse vert.x≥ 4.0.0, ≤ 4.5.34 | ≥ 5.0.0, ≤ 5.0.12 | ≥ 5.1.0, ≤ 5.1.9 | 5.2.0

1 vendor · 1 product

References

2 links