CVE-2024-8391Network attack vector

Service interruption via oversized gRPC messages

Published Sep 4, 2024 · Updated Sep 4, 2024

Denial of service in Eclipse Vert.x 4.3.0 through 4.5.9 allows remote attackers to consume memory via oversized gRPC messages. The gRPC message decoder accepts the HTTP/2 transport's 2^32-byte default limit instead of enforcing a smaller application limit. No authentication or user interaction is required; a reachable affected gRPC client or server can exhaust memory and interrupt service.

CVSS severity6.9
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Eclipse Vert.x 4.3.0 through 4.5.9 allows remote attackers to consume memory via oversized gRPC messages. The gRPC message decoder accepts the HTTP/2 transport's 2^32-byte default limit instead of enforcing a smaller application limit. No authentication or user interaction is required; a reachable affected gRPC client or server can exhaust memory and interrupt service.

The record

CVE
CVE-2024-8391
Published
Sep 4, 2024
Updated
Sep 4, 2024
Vendor
The Eclipse Foundation
Product
Eclipse Vert.x
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3.0 <4.5.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Vert.xversion=4.3.0 <4.5.10
The Eclipse Foundation · Vert.xversion=4.3.0 <4.5.10

Published CVSS scores

6.9Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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