CVE-2025-3108

Description

Incomplete Documentation of Program Execution exists in the run-llama/llama_index library's JsonPickleSerializer component, affecting versions v0.12.27 through v0.12.40. This vulnerability allows remote code execution due to an insecure fallback to Python's pickle module. JsonPickleSerializer prioritizes deserialization using pickle.loads(), which can execute arbitrary code when processing untrusted data. Attackers can exploit this by crafting malicious payloads to achieve full system compromise. The root cause involves the use of an insecure fallback strategy without sufficient input validation or protective safeguards. Version 0.12.41 renames JsonPickleSerializer to PickleSerializer and adds a warning to the docs to only use PickleSerializer to deserialize safe things.

How to fix CVE-2025-3108

To remediate CVE-2025-3108, upgrade the affected package to a fixed version below.

• —upgrade to 0.12.41 or later

Is CVE-2025-3108 being exploited?

Low — EPSS is 1.6%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• >= 0.11.15, < 0.12.41

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-3108
• PATCHgithub.com/run-llama/llama_index
• WEBgithub.com/run-llama/llama_index/blob/v0.12.41/CHANGELOG.md#llama-index-core-01241
• WEBgithub.com/run-llama/llama_index/commit/702e4340623092fac4cf2fe95eb9465034856da3