CVE-2026-44888Public exploitNetwork attack vector

Unauthenticated RCE via unvalidated numeric configuration values

Published May 27, 2026 · Updated May 27, 2026

Code injection in leiweibau Pi.Alert before 2026-05-07 allows remote attackers to execute arbitrary Python code through SaveConfigFile(). The endpoint writes unvalidated numeric configuration values into pialert.conf, which the cron-launched backend executes with Python exec() every three to five minutes. Default installations disable web protection, so no credentials are required; injected code runs as the operating-system account for the Pi.Alert backend.

CVSS severity9.8
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in leiweibau Pi.Alert before 2026-05-07 allows remote attackers to execute arbitrary Python code through SaveConfigFile(). The endpoint writes unvalidated numeric configuration values into pialert.conf, which the cron-launched backend executes with Python exec() every three to five minutes. Default installations disable web protection, so no credentials are required; injected code runs as the operating-system account for the Pi.Alert backend.

The record

CVE
CVE-2026-44888
Published
May 27, 2026
Updated
May 27, 2026
Vendor
leiweibau
Product
Pi.Alert
Classifications
CWE-94, T1190, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=< 2026-05-07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

leiweibau · Pi.Alertversion=< 2026-05-07

Published CVSS scores

9.8GitHub, Inc.CVSS: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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application
T1059.006Command and Scripting Interpreter: Python

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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