Vulnerability-Lookup

GHSA-5RX2-XP53-9X5R

Vulnerability from github – Published: 2026-10-20 03:32 – Updated: 2026-10-20 03:32

Details

Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).

Severity

9.8 (Critical)


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

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-75128"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-20T01:17:19Z",
    "severity": "CRITICAL"
  },
  "details": "Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).",
  "id": "GHSA-5rx2-xp53-9x5r",
  "modified": "2026-10-20T03:32:45Z",
  "published": "2026-10-20T03:32:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75128"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33"
    },
    {
      "type": "WEB",
      "url": "https://www.lasso.security/vulnerability-database/cve-2026-75128"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-75128 (GCVE-0-2026-75128)

Vulnerability from cvelistv5 – Published: 2026-10-20 00:46 – Updated: 2026-10-20 14:34

Title

Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

9.8 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-20 14:33 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6614 records in the last 180 days details

References

3 references

URL	Tags
https://www.lasso.security/vulnerability-database…	technical-descriptionexploit
https://github.com/chatchat-space/Langchain-Chatc…	technical-description
https://www.vulncheck.com/advisories/langchain-ch…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
chatchat-space	Langchain-Chatchat	Affected: 0 , ≤ 0.3.1.3 (custom) cpe:2.3:a:chatchat-space:langchain-chatchat::::::::

Date Public

2026-10-15 00:00

Credits

Noy Pearl Michael Sromin Ophir Dror

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-75128",
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-20T14:33:41.797170Z",
                "version": "2.0.3"
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    "cna": {
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          "collectionURL": "https://pypi.org",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:pypi/langchain-chatchat",
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          "repo": "https://github.com/chatchat-space/Langchain-Chatchat",
          "vendor": "chatchat-space",
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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.

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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.
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