CVE-2026-52831Public exploitNetwork attack vectorHinoki check available

Persistent RCE via cron-trigger shell command injection

Published Sep 2, 2026 · Updated Sep 3, 2026

OS command injection in Iguazio Nuclio before 1.16.4 allows remote attackers to execute commands through crafted cron triggers. generateCronTriggerCronJobSpec concatenates unescaped event.headers keys and shell-expandable event.body text into a curl string executed by /bin/sh -c. The default unauthenticated Dashboard API permits network-reachable attackers to create the trigger, and its CronJob can keep executing after function deletion because it lacks an owner reference.

CVSS severity8.0
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in Iguazio Nuclio before 1.16.4 allows remote attackers to execute commands through crafted cron triggers. generateCronTriggerCronJobSpec concatenates unescaped event.headers keys and shell-expandable event.body text into a curl string executed by /bin/sh -c. The default unauthenticated Dashboard API permits network-reachable attackers to create the trigger, and its CronJob can keep executing after function deletion because it lacks an owner reference.

The record

CVE
CVE-2026-52831
Published
Sep 2, 2026
Updated
Sep 3, 2026
Vendor
Iguazio
Product
Nuclio
Classifications
CWE-78, T1053.003, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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=< 1.16.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Iguazio · Nuclioversion=< 1.16.4

Published CVSS scores

10.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
8.0NuclioCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/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.

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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1053.003Scheduled Task/Job: Cron
T1059.004Command and Scripting Interpreter: Unix Shell

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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