CVE-2025-3108Network attack vector

Remote code execution via pickle-first deserialization

Published Jul 6, 2025 · Updated Jul 7, 2025

Unsafe deserialization in LlamaIndex 0.12.27 through 0.12.40 allows remote attackers to execute code through a crafted workflow context. JsonPickleSerializer base64-decodes the supplied value and passes it to pickle.loads before attempting the safer JSON deserializer, allowing pickle opcodes to run. Exploitation requires a consuming application to deserialize attacker-controlled context with this optional serializer and user interaction; code runs with the host process's privileges.

CVSS severity5.0
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in LlamaIndex 0.12.27 through 0.12.40 allows remote attackers to execute code through a crafted workflow context. JsonPickleSerializer base64-decodes the supplied value and passes it to pickle.loads before attempting the safer JSON deserializer, allowing pickle opcodes to run. Exploitation requires a consuming application to deserialize attacker-controlled context with this optional serializer and user interaction; code runs with the host process's privileges.

The record

CVE
CVE-2025-3108
Published
Jul 6, 2025
Updated
Jul 7, 2025
Vendor
LlamaIndex
Product
LlamaIndex
Classifications
CWE-1112, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 2025Record 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.

  1. Affected versionversion=unspecified <v0.12.41

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LlamaIndex · LlamaIndexversion=unspecified <v0.12.41

Published CVSS scores

5.0huntr.ai CNACVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1112Incomplete Documentation of Program Execution
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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