CVE-2023-45820Public exploitNetwork attack vector

Service crash via unhandled malformed WebSocket frame

Published Oct 19, 2023 · Updated Sep 12, 2024

Denial of service in Directus 10.4 through 10.6.1 allows remote attackers to crash WebSocket-enabled servers with an invalid frame. SocketController registers upgraded connections without an error listener, so the ws library's RangeError escapes and terminates the API process. WebSockets must be enabled, and an unauthenticated network client can interrupt service until the process restarts or a supervisor recovers it.

CVSS severity7.5
High
EPSS probability0.69%
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 Directus 10.4 through 10.6.1 allows remote attackers to crash WebSocket-enabled servers with an invalid frame. SocketController registers upgraded connections without an error listener, so the ws library's RangeError escapes and terminates the API process. WebSockets must be enabled, and an unauthenticated network client can interrupt service until the process restarts or a supervisor recovers it.

The record

CVE
CVE-2023-45820
Published
Oct 19, 2023
Updated
Sep 12, 2024
Vendor
Directus
Product
Directus
Classifications
CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>=10.4, < 10.6.2
  2. Affected versionversion=10.4 <10.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Directus · Directusversion=>=10.4, < 10.6.2; version=10.4 <10.6.2

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5GitHubCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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