OESA-2025-1532 (CVE-2025-27516)

Vulnerability from osv_openeuler – Published: 2025-05-16 11:08 – Updated: 2026-08-06 11:08 – Source website
VLAI
Summary
python-jinja2 security update
Details

Jinja2 is one of the most used template engines for Python. It is inspired by Django's templating system but extends it with an expressive language that gives template authors a more powerful set of tools. On top of that it adds sandboxed execution and optional automatic escaping for applications where security is important.

Security Fix(es):

Jinja is an extensible templating engine. Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.(CVE-2025-27516)

Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "noarch": [
          "python-jinja2-help-3.1.3-5.oe2403sp1.noarch.rpm",
          "python3-jinja2-3.1.3-5.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "python-jinja2-3.1.3-5.oe2403sp1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "python-jinja2",
        "purl": "pkg:rpm/openEuler/python-jinja2\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.3-5.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Jinja2 is one of the most used template engines for Python. It is inspired by Django\u0026amp;apos;s templating system but extends it with an expressive language that gives template authors a more powerful set of tools. On top of that it adds sandboxed execution and optional automatic escaping for applications where security is important.\r\n\r\nSecurity Fix(es):\n\nJinja is an extensible templating engine. Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja\u0026apos;s sandbox does catch calls to str.format and ensures they don\u0026apos;t escape the sandbox. However, it\u0026apos;s possible to use the |attr filter to get a reference to a string\u0026apos;s plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment\u0026apos;s attribute lookup. This vulnerability is fixed in 3.1.6.(CVE-2025-27516)",
  "id": "OESA-2025-1532",
  "modified": "2026-08-06T11:08:37Z",
  "published": "2025-05-16T11:08:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1532"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27516"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-jinja2 security update",
  "upstream": [
    "CVE-2025-27516"
  ]
}



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