Denial of service via post-enumeration file limiting
Published Feb 2, 2026 · Updated Feb 2, 2026
Uncontrolled resource consumption in LlamaIndex before 0.12.41 allows remote attackers to exhaust memory through oversized directories. SimpleDirectoryReader._add_files materializes every matching path with fs.glob before applying num_files_limit, so the limit does not bound enumeration memory. Exploitation requires an application to expose a reader-controlled directory or filesystem to untrusted input; the bounded consequence is memory exhaustion and service degradation.
Summary
What happened
Uncontrolled resource consumption in LlamaIndex before 0.12.41 allows remote attackers to exhaust memory through oversized directories. SimpleDirectoryReader._add_files materializes every matching path with fs.glob before applying num_files_limit, so the limit does not bound enumeration memory. Exploitation requires an application to expose a reader-controlled directory or filesystem to untrusted input; the bounded consequence is memory exhaustion and service degradation.
The record
- CVE
- CVE-2025-6208
- Published
- Feb 2, 2026
- Updated
- Feb 2, 2026
- Vendor
- LlamaIndex
- Product
- LlamaIndex
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 2, 2026CVE publishedPublication date reported by the CVE source.
- Feb 2, 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.
- Affected versionversion=unspecified <0.12.41
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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