PYSEC-2026-1625

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 17:24
VLAI
Details

A vulnerability has been discovered and fixed in Mesop that could potentially allow unauthorized access to files on the server hosting the Mesop application. The vulnerability was related to insufficient input validation in a specific endpoint. This could have allowed an attacker to access files not intended to be served.

Users are strongly advised to update to the latest version of Mesop immediately. The latest version includes a fix for this vulnerability.

We would like to thank @Letm3through for reporting this issue and proposing mitigations to address this issue.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Impacted products
Name purl
mesop pkg:pypi/mesop
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mesop",
        "purl": "pkg:pypi/mesop"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.9.0"
            },
            {
              "fixed": "0.12.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0",
        "0.10.0rc0",
        "0.10.0rc1",
        "0.10.0rc2",
        "0.11.0",
        "0.11.0rc0",
        "0.11.1",
        "0.12.0",
        "0.12.0rc0",
        "0.12.1",
        "0.12.1rc0",
        "0.12.2",
        "0.12.3",
        "0.12.3rc0",
        "0.12.4rc0",
        "0.9.0",
        "0.9.1",
        "0.9.1rc1",
        "0.9.2",
        "0.9.2rc1",
        "0.9.3",
        "0.9.3rc0",
        "0.9.4",
        "0.9.4rc0",
        "0.9.5",
        "0.9.5rc0"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-45601",
    "GHSA-pmv9-3xqp-8w42"
  ],
  "details": "A vulnerability has been discovered and fixed in Mesop that could potentially allow unauthorized access to files on the server hosting the Mesop application. The vulnerability was related to insufficient input validation in a specific endpoint. This could have allowed an attacker to access files not intended to be served.\n\nUsers are strongly advised to update to the latest version of Mesop immediately. The latest version includes a fix for this vulnerability.\n\nWe would like to thank @Letm3through for reporting this issue and proposing mitigations to address this issue.",
  "id": "PYSEC-2026-1625",
  "modified": "2026-07-07T17:24:40.671996Z",
  "published": "2026-07-07T14:34:42.040306Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/google/mesop/security/advisories/GHSA-pmv9-3xqp-8w42"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45601"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/mesop/commit/17fb769d6a91f0a8cbccfab18f64977b158a6a31"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/google/mesop"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/mesop"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-pmv9-3xqp-8w42"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Mesop has a local file Inclusion via static file serving functionality"
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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