Vulnerability-Lookup

PYSEC-2025-249

Vulnerability from pysec - Published: 2025-07-06 23:15 - Updated: 2026-07-13 05:49

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Impacted products

Name	purl
llama-index	pkg:pypi/llama-index

Aliases

CVE-2025-3108

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "llama-index",
        "purl": "pkg:pypi/llama-index"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.12.27"
            },
            {
              "fixed": "0.12.41"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.12.27",
        "0.12.28",
        "0.12.29",
        "0.12.30",
        "0.12.31",
        "0.12.32",
        "0.12.33",
        "0.12.34",
        "0.12.35",
        "0.12.36",
        "0.12.37",
        "0.12.38",
        "0.12.39",
        "0.12.40"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-3108"
  ],
  "details": "A critical deserialization vulnerability exists in the run-llama/llama_index library\u0027s JsonPickleSerializer component, affecting versions v0.12.27 through v0.12.40. This vulnerability allows remote code execution due to an insecure fallback to Python\u0027s 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.",
  "id": "PYSEC-2025-249",
  "modified": "2026-07-13T05:49:40.746624Z",
  "published": "2025-07-06T23:15:21.777Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/run-llama/llama_index/commit/702e4340623092fac4cf2fe95eb9465034856da3"
    },
    {
      "type": "EVIDENCE",
      "url": "https://huntr.com/bounties/9b55a5e8-74e6-4241-b323-e360dc8b110a"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-3108 (GCVE-0-2025-3108)

Vulnerability from cvelistv5 – Published: 2025-07-06 22:47 – Updated: 2025-07-07 13:43

Title

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

Summary

Severity

5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-07 13:42 UTC

CWE

CWE-1112 - Incomplete Documentation of Program Execution

Assigner

@huntr_ai mitre root

References

2 references

URL	Tags
https://huntr.com/bounties/9b55a5e8-74e6-4241-b32…
https://github.com/run-llama/llama_index/commit/7…

Impacted products

1 product

Vendor	Product	Version
run-llama	run-llama/llama_index	Affected: unspecified , < v0.12.41 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-3108",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-07T13:42:15.611862Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-07T13:43:12.649Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "run-llama/llama_index",
          "vendor": "run-llama",
          "versions": [
            {
              "lessThan": "v0.12.41",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A critical deserialization vulnerability exists in the run-llama/llama_index library\u0027s JsonPickleSerializer component, affecting versions v0.12.27 through v0.12.40. This vulnerability allows remote code execution due to an insecure fallback to Python\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1112",
              "description": "CWE-1112 Incomplete Documentation of Program Execution",
              "lang": "en",
              "type": "CWE"
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2025-07-06T22:47:25.655Z",
        "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "shortName": "@huntr_ai"
      },
      "references": [
        {
          "url": "https://huntr.com/bounties/9b55a5e8-74e6-4241-b323-e360dc8b110a"
        },
        {
          "url": "https://github.com/run-llama/llama_index/commit/702e4340623092fac4cf2fe95eb9465034856da3"
        }
      ],
      "source": {
        "advisory": "9b55a5e8-74e6-4241-b323-e360dc8b110a",
        "discovery": "EXTERNAL"
      },
      "title": "Unsafe Deserialization in JsonPickleSerializer Enables Remote Code Execution in run-llama/llama_index"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
    "assignerShortName": "@huntr_ai",
    "cveId": "CVE-2025-3108",
    "datePublished": "2025-07-06T22:47:25.655Z",
    "dateReserved": "2025-04-02T06:33:56.248Z",
    "dateUpdated": "2025-07-07T13:43:12.649Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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