Description
An XML Entity Expansion vulnerability, also known as a 'billion laughs' attack, exists in the sitemap parser of the run-llama/llama_index repository, specifically affecting version v0.12.21. This vulnerability allows an attacker to supply a malicious Sitemap XML, leading to a Denial of Service (DoS) by exhausting system memory and potentially causing a system crash. The issue is resolved in version v0.12.29.
Scores
CVSS v3
7.5
EPSS
0.0012
EPSS Percentile
30.9%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-776
Status
published
Products (2)
llamaindex/llamaindex
0.12.21 - 0.12.29
pypi/llama-index-readers-papers
0 - 0.3.2PyPI
Published
Jul 07, 2025
Tracked Since
Feb 18, 2026