PYSEC-2026-1512

Vulnerability from pysec - Published: 2026-07-07 16:02 - Updated: 2026-07-07 17:24
VLAI
Details

A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may be used.

Severity
5.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.0 (Low)
CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Impacted products
Name purl
langchain-chatchat pkg:pypi/langchain-chatchat
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "langchain-chatchat",
        "purl": "pkg:pypi/langchain-chatchat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.0",
        "0.3.0.20240506",
        "0.3.0.20240606",
        "0.3.0.20240610",
        "0.3.0.20240610.1",
        "0.3.0.20240611",
        "0.3.0.20240612",
        "0.3.0.20240612.1",
        "0.3.0.20240612.2",
        "0.3.0.20240612.3",
        "0.3.0.20240612.4",
        "0.3.0.20240616",
        "0.3.0.20240618",
        "0.3.0.20240619",
        "0.3.0.20240621",
        "0.3.0.20240621.3",
        "0.3.0.20240625",
        "0.3.0.20240625.1",
        "0.3.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-6855",
    "GHSA-f823-phmg-x5fr"
  ],
  "details": "A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may be used.",
  "id": "PYSEC-2026-1512",
  "modified": "2026-07-07T17:24:27.128532Z",
  "published": "2026-07-07T16:02:56.054752Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6855"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chatchat-space/Langchain-Chatchat/issues/5354"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chatchat-space/Langchain-Chatchat"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.314327"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.314327"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.601162"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/langchain-chatchat"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-f823-phmg-x5fr"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Langchain-Chatchat vulnerable to path traversal"
}



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Sightings

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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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