CVE-2022-39272Network attack vector

Authenticated processing halt via malformed duration fields

Published Oct 21, 2022 · Updated Apr 23, 2025

Improper input validation in Flux before 0.35.0 allows remote authenticated users to halt processing for an entire object type. Flux controllers accept invalid values in .spec.interval, .spec.timeout, and structured variants because metav1.Duration is incompatible with time.Duration and the fields lack validation. Permission to change Flux objects through a source or the Kubernetes API is required, and one malformed value stops reconciliation for every object of that type.

CVSS severity5.0
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Flux before 0.35.0 allows remote authenticated users to halt processing for an entire object type. Flux controllers accept invalid values in .spec.interval, .spec.timeout, and structured variants because metav1.Duration is incompatible with time.Duration and the fields lack validation. Permission to change Flux objects through a source or the Kubernetes API is required, and one malformed value stops reconciliation for every object of that type.

The record

CVE
CVE-2022-39272
Published
Oct 21, 2022
Updated
Apr 23, 2025
Vendor
Flux CD
Product
Flux
Classifications
CWE-20, CWE-1284, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 0.35.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flux CD · Fluxversion=< 0.35.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.0GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-1284Improper Validation of Specified Quantity in Input
T1499Endpoint Denial of Service

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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