Unauthenticated service hang via quadratic regex backtracking
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 crafted template text. The compileTextTemplate function applies the /{{(.*?)}}/g expression to untrusted input, where long brace sequences trigger quadratic backtracking. No authentication or user interaction is required, and successful exploitation leaves the service unresponsive to requests.
Summary
What happened
Regular expression denial of service in Lunary before 1.4.23 allows remote attackers to hang the server with crafted template text. The compileTextTemplate function applies the /{{(.*?)}}/g expression to untrusted input, where long brace sequences trigger quadratic backtracking. No authentication or user interaction is required, and successful exploitation leaves the service unresponsive to requests.
The record
- CVE
- CVE-2024-8763
- 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
- Mar 20, 2025CVE publishedPublication date reported by the CVE source.
- Oct 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <1.4.23
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Huntr compileTextTemplate ReDoS proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo