CVE-2025-3108

Public Exploit
Unsafe Deserialization in JsonPickleSerializer Enables Remote Code Execution in run-llama/llama_index

Description

A critical deserialization vulnerability 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 includes an insecure fallback mechanism, lack of validation or safeguards, misleading design, and violation of Python security guidelines.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
EPSS 0.18%
Third-Party Advisory huntr.com
Affected: run-llama run-llama/llama_index
Published at:
Updated at:

References

Link Tags
https://huntr.com/bounties/9b55a5e8-74e6-4241-b323-e360dc8b110a third party advisory exploit
https://github.com/run-llama/llama_index/commit/702e4340623092fac4cf2fe95eb9465034856da3 patch

Frequently Asked Questions

What is the severity of CVE-2025-3108?
CVE-2025-3108 has been scored as a high severity vulnerability.
How to fix CVE-2025-3108?
To fix CVE-2025-3108, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-3108 being actively exploited in the wild?
It is possible that CVE-2025-3108 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-3108?
CVE-2025-3108 affects run-llama run-llama/llama_index.
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