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CVE-2025-7707

World-Writable NLTK Cache Directory Vulnerability in run-llama/llama_index

Published: Oct 13, 2025Updated: Oct 21, 2025 Sources: CVE List NVD GHSACWE-377
NVD MITRE
7.8CVSSHIGH
EPSS Score
0.2%
Top 93.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

The llama_index library version 0.12.33 sets the NLTK data directory to a subdirectory of the codebase by default, which is world-writable in multi-user environments. This configuration allows local users to overwrite, delete, or corrupt NLTK data files, leading to potential denial of service, data tampering, or privilege escalation. The vulnerability arises from the use of a shared cache directory instead of a user-specific one, making it susceptible to local data tampering and denial of service.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-377

Affected Products

run-llama/llama_indexrun-llama
Library
AI / ML / ai-agent-tooling
llama-indexPyPIOSS Libraries
llamaindexllamaindex
Library
AI / ML / llm-serving-inference
run-llamaoss-projectAI / ML
pypipackage-ecosystemOSS Libraries
llamaindexoss-projectAI / MLaka llama index, llamaindex.ai

Exploitability

Official Patch Available

References

https://huntr.com/bounties/3fe2c8ab-6727-4aef-a0ef-4d2818e48803
huntr.com
https://github.com/run-llama/llama_index/commit/98816394d57c7f53f847ed7b60725e69d0e7aae4
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-7707
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Oct 13, 2025
Last Updated
Oct 21, 2025

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