CVE-2024-8998
Published: 20 March 2025
Summary
CVE-2024-8998 is a high-severity Inefficient Regular Expression Complexity (CWE-1333) vulnerability in Lunary Lunary. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked in the top 41.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
This vulnerability is AI-related — categorised as LLM Application Platforms; in the Other ATLAS/OWASP Terms risk domain.
The strongest mitigations our analysis identified are NIST 800-53 SC-5 (Denial-of-service Protection) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2024-8998 is a Regular Expression Denial of Service (ReDoS) vulnerability in the lunary-ai/lunary server at commit git f07a845. The issue stems from the regex pattern /{.*?}/ applied to user-controlled strings, which exhibits polynomial-time complexity in the default JavaScript regex engine when processing certain crafted inputs. This affects the server's ability to process requests efficiently, as rated by a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and mapped to CWE-1333.
Any unauthenticated remote attacker can exploit this vulnerability by submitting a specially crafted payload that triggers excessive backtracking in the regex engine. Successful exploitation causes the server to hang for an arbitrary duration, resulting in a denial of service that impacts availability without requiring privileges or user interaction.
The vulnerability is fixed in lunary-ai/lunary version 1.4.26, as detailed in the patching commit at https://github.com/lunary-ai/lunary/commit/f2bfa036caf2c48686474f4560a9c5abcf5f43b7. Additional details are available via the Huntr advisory at https://huntr.com/bounties/4dbd8648-1dca-4f95-b74f-978ef030e97e. Security practitioners should upgrade to the patched version and review regex usage in Node.js applications for similar ReDoS risks.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-6879
Vulnerability details
A Regular Expression Denial of Service (ReDoS) vulnerability exists in lunary-ai/lunary version git f07a845. The server uses the regex /{.*?}/ to match user-controlled strings. In the default JavaScript regex engine, this regex can take polynomial time to match certain crafted…
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user inputs. As a result, an attacker can cause the server to hang for an arbitrary amount of time by submitting a specially crafted payload. This issue is fixed in version 1.4.26.
- CWE(s)
AI Security AnalysisAI
- AI Category
- LLM Application Platforms
- Risk Domain
- Other ATLAS/OWASP Terms
- OWASP Top 10 for LLMs 2025
- None mapped
- Classification Reason
- Matched keywords: ai, lunary
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
ReDoS vulnerability enables crafted input to trigger polynomial-time regex matching, causing server CPU exhaustion and hang, facilitating application exploitation for endpoint DoS.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the ReDoS vulnerability by requiring timely remediation through patching to the fixed version 1.4.26.
Requires validation of user-controlled inputs to reject or sanitize crafted strings that trigger polynomial-time backtracking in the vulnerable regex /{.*?}/.
Implements denial-of-service protections such as request timeouts or resource limits to prevent server hangs from ReDoS exploitation.