CVE-2026-75128

validated

GHSA-5rx2-xp53-9x5r ↗EUVD-2026-104685 ↗

check availablenot proven exploitable

cve.orgpublic pockev

chatchat-space Langchain-Chatchat <= 0.3.1.3

CWE-306 Missing Authentication for Critical Function

ETK-2026-2110, permanent identifier

pkg:pypi/Langchain-Chatchat

cvss9.3cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

+1h25mTTV

43mAI analysis

Check if you are vulnerable

timeline

0 = trigger signal

trigger signal (cve.org) +0mcheck available+85magent stopped

+30min

+60min

description

Langchain-Chatchat through 0.3.1.3 exposes a tool-call API that does not require authentication. An attacker able to reach this API can invoke the registered shell tool and execute operating-system commands as the server user; the shipped container runs that user as root.

mitigation

Disable or unregister the shell tool and prevent untrusted clients from reaching the tool-call API by requiring authentication and applying network access controls. Run the service as a non-root user; no fixed version is recorded in the advisory.

check

available

exploit

automation

deterministic

auth required

EPSS

0.52%43rd percentile

agent run time

43m

cve.org record, t = 0

2026-10-20 00:46Z

Δ to public poc

–

Δ to kev

–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-10-20 00:46Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-75128

this entry in the feed

GET /api/v1/feed/CVE-2026-75128

{
  "etk_id": "ETK-2026-2110",
  "cve_id": "CVE-2026-75128",
  "display_id": "CVE-2026-75128",
  "ghsa_id": "GHSA-5rx2-xp53-9x5r",
  "euvd_id": "EUVD-2026-104685",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated command execution in Langchain-Chatchat",
  "summary": "Langchain-Chatchat through 0.3.1.3 exposes a tool-call API that does not require authentication. An attacker able to reach this API can invoke the registered shell tool and execute operating-system commands as the server user; the shipped container runs that user as root.",
  "mitigation": "Disable or unregister the shell tool and prevent untrusted clients from reaching the tool-call API by requiring authentication and applying network access controls. Run the service as a non-root user; no fixed version is recorded in the advisory.",
  "vendor": "chatchat-space",
  "product": "Langchain-Chatchat",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 0.3.1.3"
      ],
      "ecosystem": "pypi",
      "fixed_versions": [],
      "package_name": "Langchain-Chatchat",
      "purl": "pkg:pypi/Langchain-Chatchat"
    }
  ],
  "cwes": [
    306
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "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",
  "epss_score": 0.0052,
  "epss_percentile": 0.4318,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 42.70159436666667,
  "t0_at": "2026-10-20T00:46:08.977000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-20T02:11:29.023245+00:00",
      "days": 0.05925979450231481,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T00:46:08.977000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-20T00:46:08.977000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T00:46:08.977000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-75128"
    }
  }
}

published 2026-10-20 01:28Z
last change 2026-10-21 05:31Z

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