CVE-2024-8789Public exploitNetwork attack vector

Server hang via user-controlled regular expressions

Published Mar 20, 2025 · Updated Oct 15, 2025

Regular expression denial of service in Lunary before 1.4.23 allows remote attackers to hang the server with a crafted check pattern. The backend check runner compiled user-controlled regex values with JavaScript RegExp and tested them against run content, permitting exponential backtracking. No authentication or user interaction is required, and successful exploitation makes the service unresponsive for an attacker-controlled duration.

CVSS severity7.5
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in Lunary before 1.4.23 allows remote attackers to hang the server with a crafted check pattern. The backend check runner compiled user-controlled regex values with JavaScript RegExp and tested them against run content, permitting exponential backtracking. No authentication or user interaction is required, and successful exploitation makes the service unresponsive for an attacker-controlled duration.

The record

CVE
CVE-2024-8789
Published
Mar 20, 2025
Updated
Oct 15, 2025
Vendor
Lunary
Product
Lunary
Classifications
CWE-1333, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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=unspecified <1.4.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lunary · Lunaryversion=unspecified <1.4.23

Published CVSS scores

7.5huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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.

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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-1333Inefficient Regular Expression Complexity
T1499Endpoint Denial of Service

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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