CVE-2026-72589Network attack vectorHinoki check available

Unauthenticated RCE via imported hook shell injection

Published Aug 10, 2026 · Updated Aug 10, 2026

OS command injection in alseambusher crontab-ui 0.4.2 and earlier allows remote attackers to execute system commands via a crafted database import. The POST /import handler streams any uploaded file over crontab.db, and makeCommand() appends each imported hook value to a shell command without validation or quoting. Basic authentication is optional and disabled unless both credentials are configured; execution occurs under the service account when the imported job next runs.

CVSS severity9.8
Critical
EPSS probability1.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

OS command injection in alseambusher crontab-ui 0.4.2 and earlier allows remote attackers to execute system commands via a crafted database import. The POST /import handler streams any uploaded file over crontab.db, and makeCommand() appends each imported hook value to a shell command without validation or quoting. Basic authentication is optional and disabled unless both credentials are configured; execution occurs under the service account when the imported job next runs.

The record

CVE
CVE-2026-72589
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
alseambusher
Product
crontab-ui
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record 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 <=0.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

alseambusher · crontab-uiversion=0 <=0.4.2

Published CVSS scores

9.8TuranSecCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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