Vulnerability-Lookup

CVE-2026-59213 (GCVE-0-2026-59213)

Vulnerability from cvelistv5 – Published: 2026-07-09 16:55 – Updated: 2026-07-09 17:52

Title

Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)

Summary

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user’s model list to another caller during the TTL window. This issue is fixed in version 0.10.0.

Severity

3.5 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 17:52 UTC

CWE

CWE-524 - Use of Cache Containing Sensitive Information

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/open-webui/open-webui/security…	x_refsource_CONFIRM
https://github.com/open-webui/open-webui/pull/25783	x_refsource_MISC
https://github.com/open-webui/open-webui/commit/0…	x_refsource_MISC
https://github.com/open-webui/open-webui/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
open-webui	open-webui	Affected: >= 0.6.27, < 0.10.0	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59213",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T17:52:02.458867Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T17:52:21.479Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.6.27, \u003c 0.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user\u2019s model list to another caller during the TTL window. This issue is fixed in version 0.10.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-524",
              "description": "CWE-524: Use of Cache Containing Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T16:55:00.032Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
        },
        {
          "name": "https://github.com/open-webui/open-webui/pull/25783",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/pull/25783"
        },
        {
          "name": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
        },
        {
          "name": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
        }
      ],
      "source": {
        "advisory": "GHSA-3wp3-xxj9-5jqq",
        "discovery": "UNKNOWN"
      },
      "title": "Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59213",
    "datePublished": "2026-07-09T16:55:00.032Z",
    "dateReserved": "2026-07-02T21:05:02.924Z",
    "dateUpdated": "2026-07-09T17:52:21.479Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-59213",
      "date": "2026-09-27",
      "epss": "0.00373",
      "percentile": "0.28636"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "open-webui",
                "vendor": "open-webui",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 0.6.27, \u003c 0.10.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8378007E-9B19-40C9-A6DD-A34617BDC68D",
                    "versionEndExcluding": "0.10.0",
                    "versionStartIncluding": "0.6.27",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user\u2019s model list to another caller during the TTL window. This issue is fixed in version 0.10.0."
          }
        ],
        "id": "CVE-2026-59213",
        "lastModified": "2026-07-10T19:49:23.313",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 3.5,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 1.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.1,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-59213",
                "options": [
                  {
                    "exploitation": "poc"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T17:52:02.458867Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-07-09T17:17:02.030",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch"
            ],
            "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Issue Tracking",
              "Patch"
            ],
            "url": "https://github.com/open-webui/open-webui/pull/25783"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product",
              "Release Notes"
            ],
            "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Exploit",
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "tags": [
              "Exploit",
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-524"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-59213",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-07-09T17:52:02.458867Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-07-09T17:52:17.792Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "open-webui",
              "vendor": "open-webui",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003e= 0.6.27, \u003c 0.10.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user\u2019s model list to another caller during the TTL window. This issue is fixed in version 0.10.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 3.5,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-524",
                  "description": "CWE-524: Use of Cache Containing Sensitive Information",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-09T16:55:00.032Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
            },
            {
              "name": "https://github.com/open-webui/open-webui/pull/25783",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/open-webui/open-webui/pull/25783"
            },
            {
              "name": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
            },
            {
              "name": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
            }
          ],
          "source": {
            "advisory": "GHSA-3wp3-xxj9-5jqq",
            "discovery": "UNKNOWN"
          },
          "title": "Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-59213",
        "datePublished": "2026-07-09T16:55:00.032Z",
        "dateReserved": "2026-07-02T21:05:02.924Z",
        "dateUpdated": "2026-07-09T17:52:21.479Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-59213

Vulnerability from fkie_nvd - Published: 2026-07-09 17:17 - Updated: 2026-07-10 19:49

Severity

3.5 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
5.0 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75	Patch
security-advisories@github.com	https://github.com/open-webui/open-webui/pull/25783	Issue Tracking, Patch
security-advisories@github.com	https://github.com/open-webui/open-webui/releases/tag/v0.10.0	Product, Release Notes
security-advisories@github.com	https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq	Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	openwebui	open_webui	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "open-webui",
          "vendor": "open-webui",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.6.27, \u003c 0.10.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8378007E-9B19-40C9-A6DD-A34617BDC68D",
              "versionEndExcluding": "0.10.0",
              "versionStartIncluding": "0.6.27",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.27 before 0.10.0, get_all_models handlers in routers/openai.py and routers/ollama.py passed a lambda to aiocache key instead of key_builder, causing permission-filtered per-user model lists to share a static cache entry and exposing one user\u2019s model list to another caller during the TTL window. This issue is fixed in version 0.10.0."
    }
  ],
  "id": "CVE-2026-59213",
  "lastModified": "2026-07-10T19:49:23.313",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59213",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T17:52:02.458867Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-09T17:17:02.030",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/open-webui/open-webui/pull/25783"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-524"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-3WP3-XXJ9-5JQQ

Vulnerability from github – Published: 2026-07-24 17:03 – Updated: 2026-07-24 17:03

Summary

Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)

Details

Summary

The get_all_models handlers in routers/openai.py and routers/ollama.py intended to cache their permission-filtered model lists per user, but the @cached decorator was misconfigured: it passed a key= lambda instead of key_builder=. In aiocache 0.12.3 (the pinned version), key= is a static cache key — a callable passed there is used as a constant object, not invoked per call. As a result the per-user key was never computed, and all callers collided onto a single shared cache entry within the TTL window. During that window, one user's permission-filtered model list could be served to a different authenticated user, crossing the per-user authorization boundary.

Impact

Boundary crossed: Confidentiality (cross-user). A caller can receive the model list scoped to a different security principal than themselves.
A user (or admin, or — depending on endpoint reachability — anonymous caller) who populates the cache causes the next caller within the TTL to receive that list rather than their own permission-filtered one.
What's disclosed is the set of models another principal can access, including potentially the existence and naming of models restricted from the receiving user.
Exposure is incidental and timing-dependent, not attacker-controlled: the leaked entry is whatever the most recent caller populated within MODELS_CACHE_TTL (default 1 second), and the attacker cannot select the victim or force a target's list into the cache.

Affected component

backend/open_webui/routers/openai.py — get_all_models (~line 488)
backend/open_webui/routers/ollama.py — get_all_models (~line 302)

Both decorated with @cached(ttl=MODELS_CACHE_TTL, key=lambda ...). No other @cached(... key=lambda ...) misuse was found elsewhere in the backend.

Root cause

aiocache 0.12's @cached treats key= as a static key; the per-call hook is key_builder= with signature key_builder(func, *args, **kwargs). Passing a callable to key= uses the callable object itself as a constant key, so every invocation resolved to the same entry and the intended per-user.id namespacing never occurred.

Reproduction (default config)

On a default deployment, configure at least two users with different model-access permissions (e.g. one model restricted to user A).
As user A, request the model list (populates the shared cache entry).
Within MODELS_CACHE_TTL (default 1s), as user B, request the model list.
User B receives user A's permission-filtered list, including models B is not permitted to see.

Remediation

Replace key= with key_builder= at both call sites and adjust the lambda to take the function as its first argument:

@cached(
    ttl=MODELS_CACHE_TTL,
    key_builder=lambda _func, request, user=None: (
        f'openai_all_models_{user.id}' if user else 'openai_all_models'
    ),
)

Severity

3.5 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.6.27"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59213"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-524"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T17:03:21Z",
    "nvd_published_at": "2026-07-09T17:17:02Z",
    "severity": "LOW"
  },
  "details": "## Summary\n\nThe `get_all_models` handlers in `routers/openai.py` and `routers/ollama.py` intended to cache their **permission-filtered** model lists per user, but the `@cached` decorator was misconfigured: it passed a `key=` lambda instead of `key_builder=`. In aiocache 0.12.3 (the pinned version), `key=` is a **static** cache key \u2014 a callable passed there is used as a constant object, not invoked per call. As a result the per-user key was never computed, and all callers collided onto a single shared cache entry within the TTL window. During that window, one user\u0027s permission-filtered model list could be served to a different authenticated user, crossing the per-user authorization boundary.\n\n## Impact\n\n- **Boundary crossed:** Confidentiality (cross-user). A caller can receive the model list scoped to a *different* security principal than themselves.\n- A user (or admin, or \u2014 depending on endpoint reachability \u2014 anonymous caller) who populates the cache causes the next caller within the TTL to receive *that* list rather than their own permission-filtered one.\n- What\u0027s disclosed is the set of models another principal can access, including potentially the existence and naming of models restricted from the receiving user.\n- Exposure is **incidental and timing-dependent**, not attacker-controlled: the leaked entry is whatever the most recent caller populated within `MODELS_CACHE_TTL` (default 1 second), and the attacker cannot select the victim or force a target\u0027s list into the cache.\n\n## Affected component\n\n- `backend/open_webui/routers/openai.py` \u2014 `get_all_models` (~line 488)\n- `backend/open_webui/routers/ollama.py` \u2014 `get_all_models` (~line 302)\n\nBoth decorated with `@cached(ttl=MODELS_CACHE_TTL, key=lambda ...)`. No other `@cached(... key=lambda ...)` misuse was found elsewhere in the backend.\n\n## Root cause\n\naiocache 0.12\u0027s `@cached` treats `key=` as a static key; the per-call hook is `key_builder=` with signature `key_builder(func, *args, **kwargs)`. Passing a callable to `key=` uses the callable object itself as a constant key, so every invocation resolved to the same entry and the intended per-`user.id` namespacing never occurred.\n\n## Reproduction (default config)\n\n1. On a default deployment, configure at least two users with *different* model-access permissions (e.g. one model restricted to user A).\n2. As user A, request the model list (populates the shared cache entry).\n3. Within `MODELS_CACHE_TTL` (default 1s), as user B, request the model list.\n4. User B receives user A\u0027s permission-filtered list, including models B is not permitted to see.\n\n## Remediation\n\nReplace `key=` with `key_builder=` at both call sites and adjust the lambda to take the function as its first argument:\n\n```python\n@cached(\n    ttl=MODELS_CACHE_TTL,\n    key_builder=lambda _func, request, user=None: (\n        f\u0027openai_all_models_{user.id}\u0027 if user else \u0027openai_all_models\u0027\n    ),\n)\n```",
  "id": "GHSA-3wp3-xxj9-5jqq",
  "modified": "2026-07-24T17:03:21Z",
  "published": "2026-07-24T17:03:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59213"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/pull/25783"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)"
}

PYSEC-2026-3589

Vulnerability from pysec - Published: 2026-08-04 11:34 - Updated: 2026-08-04 13:36

Details

Summary

Impact

Boundary crossed: Confidentiality (cross-user). A caller can receive the model list scoped to a different security principal than themselves.
A user (or admin, or — depending on endpoint reachability — anonymous caller) who populates the cache causes the next caller within the TTL to receive that list rather than their own permission-filtered one.
What's disclosed is the set of models another principal can access, including potentially the existence and naming of models restricted from the receiving user.
Exposure is incidental and timing-dependent, not attacker-controlled: the leaked entry is whatever the most recent caller populated within MODELS_CACHE_TTL (default 1 second), and the attacker cannot select the victim or force a target's list into the cache.

Affected component

backend/open_webui/routers/openai.py — get_all_models (~line 488)
backend/open_webui/routers/ollama.py — get_all_models (~line 302)

Both decorated with @cached(ttl=MODELS_CACHE_TTL, key=lambda ...). No other @cached(... key=lambda ...) misuse was found elsewhere in the backend.

Root cause

Reproduction (default config)

On a default deployment, configure at least two users with different model-access permissions (e.g. one model restricted to user A).
As user A, request the model list (populates the shared cache entry).
Within MODELS_CACHE_TTL (default 1s), as user B, request the model list.
User B receives user A's permission-filtered list, including models B is not permitted to see.

Remediation

Replace key= with key_builder= at both call sites and adjust the lambda to take the function as its first argument:

@cached(
    ttl=MODELS_CACHE_TTL,
    key_builder=lambda _func, request, user=None: (
        f'openai_all_models_{user.id}' if user else 'openai_all_models'
    ),
)

Severity

3.5 (Low)


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

Impacted products

Name	purl
open-webui	pkg:pypi/open-webui

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui",
        "purl": "pkg:pypi/open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.6.27"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.27",
        "0.6.28",
        "0.6.29",
        "0.6.30",
        "0.6.31",
        "0.6.32",
        "0.6.33",
        "0.6.34",
        "0.6.35",
        "0.6.36",
        "0.6.37",
        "0.6.38",
        "0.6.39",
        "0.6.40",
        "0.6.41",
        "0.6.42",
        "0.6.43",
        "0.7.0",
        "0.7.1",
        "0.7.2",
        "0.8.0",
        "0.8.1",
        "0.8.10",
        "0.8.11",
        "0.8.12",
        "0.8.2",
        "0.8.3",
        "0.8.4",
        "0.8.5",
        "0.8.6",
        "0.8.7",
        "0.8.8",
        "0.8.9",
        "0.9.0",
        "0.9.1",
        "0.9.2",
        "0.9.3",
        "0.9.4",
        "0.9.5",
        "0.9.6"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59213",
    "GHSA-3wp3-xxj9-5jqq"
  ],
  "details": "## Summary\n\nThe `get_all_models` handlers in `routers/openai.py` and `routers/ollama.py` intended to cache their **permission-filtered** model lists per user, but the `@cached` decorator was misconfigured: it passed a `key=` lambda instead of `key_builder=`. In aiocache 0.12.3 (the pinned version), `key=` is a **static** cache key \u2014 a callable passed there is used as a constant object, not invoked per call. As a result the per-user key was never computed, and all callers collided onto a single shared cache entry within the TTL window. During that window, one user\u0027s permission-filtered model list could be served to a different authenticated user, crossing the per-user authorization boundary.\n\n## Impact\n\n- **Boundary crossed:** Confidentiality (cross-user). A caller can receive the model list scoped to a *different* security principal than themselves.\n- A user (or admin, or \u2014 depending on endpoint reachability \u2014 anonymous caller) who populates the cache causes the next caller within the TTL to receive *that* list rather than their own permission-filtered one.\n- What\u0027s disclosed is the set of models another principal can access, including potentially the existence and naming of models restricted from the receiving user.\n- Exposure is **incidental and timing-dependent**, not attacker-controlled: the leaked entry is whatever the most recent caller populated within `MODELS_CACHE_TTL` (default 1 second), and the attacker cannot select the victim or force a target\u0027s list into the cache.\n\n## Affected component\n\n- `backend/open_webui/routers/openai.py` \u2014 `get_all_models` (~line 488)\n- `backend/open_webui/routers/ollama.py` \u2014 `get_all_models` (~line 302)\n\nBoth decorated with `@cached(ttl=MODELS_CACHE_TTL, key=lambda ...)`. No other `@cached(... key=lambda ...)` misuse was found elsewhere in the backend.\n\n## Root cause\n\naiocache 0.12\u0027s `@cached` treats `key=` as a static key; the per-call hook is `key_builder=` with signature `key_builder(func, *args, **kwargs)`. Passing a callable to `key=` uses the callable object itself as a constant key, so every invocation resolved to the same entry and the intended per-`user.id` namespacing never occurred.\n\n## Reproduction (default config)\n\n1. On a default deployment, configure at least two users with *different* model-access permissions (e.g. one model restricted to user A).\n2. As user A, request the model list (populates the shared cache entry).\n3. Within `MODELS_CACHE_TTL` (default 1s), as user B, request the model list.\n4. User B receives user A\u0027s permission-filtered list, including models B is not permitted to see.\n\n## Remediation\n\nReplace `key=` with `key_builder=` at both call sites and adjust the lambda to take the function as its first argument:\n\n```python\n@cached(\n    ttl=MODELS_CACHE_TTL,\n    key_builder=lambda _func, request, user=None: (\n        f\u0027openai_all_models_{user.id}\u0027 if user else \u0027openai_all_models\u0027\n    ),\n)\n```",
  "id": "PYSEC-2026-3589",
  "modified": "2026-08-04T13:36:25.416685Z",
  "published": "2026-08-04T11:34:42.952726Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-3wp3-xxj9-5jqq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59213"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/pull/25783"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/0fc630b34b2899599dabffffa012afd47599aa75"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/open-webui"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-3wp3-xxj9-5jqq"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocache key= vs key_builder= misuse)"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-59213 (GCVE-0-2026-59213)

FKIE_CVE-2026-59213

GHSA-3WP3-XXJ9-5JQQ

Summary

Impact

Affected component

Root cause

Reproduction (default config)

Remediation

PYSEC-2026-3589

Summary

Impact

Affected component

Root cause

Reproduction (default config)

Remediation

Tags

Sightings

Nomenclature

Related by attack behaviour