CVE-2026-102461
Eclipse Vert.x: denial of service
- Risk score
- 42/100
- CVSS
- 5.9 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 15 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 t…
- Affected
- Eclipse Vert.x
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Eclipse Vert.x: Yellow, plan it in. 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 PostgreSQL message decoder reads the 4-byte message length field from the PostgreSQL wire protocol without any maximum validation. A malicious, compromised, or man-in-the-middle PostgreSQL server can send a message hea…
The flaws
- CVE-2026-102461: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-103223: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-102465: Denial of service (CVSS 5.9 · EPSS 0%)
- CVE-2026-102469: Unsafe deserialisation can lead to remote code execution (CVSS 5.9 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Eclipse Vert.x
Where it stands
- No known exploitation
Connects to
- Same weakness: Denial of service (CWE-407). 70 other warnings in 30 days
- Same product: Earlier Eclipse Vert.x warnings. 11 in the last 90 days
Why it is Yellow
- CVSS 5.9 medium
References
Original 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
Last activity 15 Oct 2026. Patch Forecast updates every hour.