CVE-2023-27484

Pod crash via unchecked Composition patch index

Published Mar 9, 2023 · Updated Feb 25, 2025

Denial of service in Crossplane before 1.9.2, 1.10.0 through 1.10.2, and 1.11.0 through 1.11.1 allows remote authenticated users to crash its pod. When a selected Composite Resource evaluates a Composition patch, fieldpath grows the target slice to an unchecked ToFieldPath array index as high as 4294967295. The attack requires high privileges to create or update Compositions, and the resulting memory exhaustion causes the Crossplane pod to be OOM-killed.

CVSS severity6.2
Medium
EPSS probability0.68%
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 Crossplane before 1.9.2, 1.10.0 through 1.10.2, and 1.11.0 through 1.11.1 allows remote authenticated users to crash its pod. When a selected Composite Resource evaluates a Composition patch, fieldpath grows the target slice to an unchecked ToFieldPath array index as high as 4294967295. The attack requires high privileges to create or update Compositions, and the resulting memory exhaustion causes the Crossplane pod to be OOM-killed.

The record

CVE
CVE-2023-27484
Published
Mar 9, 2023
Updated
Feb 25, 2025
Vendor
Crossplane
Product
Crossplane
Classifications
CWE-20, CWE-789, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2025Record 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=>= 1.10.0, < 1.10.3
  2. Affected versionversion=>= 1.11.0, < 1.11.2
  3. Affected versionversion=< 1.9.2

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Crossplane · Crossplaneversion=>= 1.10.0, < 1.10.3; version=>= 1.11.0, < 1.11.2; version=< 1.9.2

Published CVSS scores

6.2GitHubCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-789Memory Allocation with Excessive Size Value
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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