CVE-2026-107295 (GCVE-0-2026-107295)
Vulnerability from cvelistv5
Published
2026-10-08 17:02
Modified
2026-10-08 17:53
Severity ?
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
CWE
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Summary
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 1.107.4 and 2.28.0, the Agent.to_web() and clai web development chat endpoint has missing request content-type validation. A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval decisions also leave requires_approval=True tools exposed. Binding to localhost does not prevent a browser page from reaching the loopback address. This issue is fixed in versions 1.107.4 and 2.28.0.
References
Impacted products
Vendor Product Version
pydantic pydantic-ai Version: >= 1.34.0, < 1.107.4
Version: >= 2.0.0b1, < 2.28.0
 Create a notification for this product.
   pydantic pydantic-ai-slim Version: >= 1.34.0, < 1.107.4
Version: >= 2.0.0b1, < 2.28.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107295",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-08T17:53:16.989703Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-08T17:53:29.464Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pydantic-ai",
          "vendor": "pydantic",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.34.0, \u003c 1.107.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0b1, \u003c 2.28.0"
            }
          ]
        },
        {
          "product": "pydantic-ai-slim",
          "vendor": "pydantic",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.34.0, \u003c 1.107.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0b1, \u003c 2.28.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 1.107.4 and 2.28.0, the Agent.to_web() and clai web development chat endpoint has missing request content-type validation. A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval decisions also leave requires_approval=True tools exposed. Binding to localhost does not prevent a browser page from reaching the loopback address. This issue is fixed in versions 1.107.4 and 2.28.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-352",
              "description": "CWE-352: Cross-Site Request Forgery (CSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T17:02:36.718Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/pull/7382",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/pull/7382"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/pull/7383",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/pull/7383"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4"
        },
        {
          "name": "https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0"
        }
      ],
      "source": {
        "advisory": "GHSA-h4xc-3qfq-jf93",
        "discovery": "UNKNOWN"
      },
      "title": "`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that can trigger agent tool execution"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-107295",
    "datePublished": "2026-10-08T17:02:36.718Z",
    "dateReserved": "2026-10-07T15:53:23.587Z",
    "dateUpdated": "2026-10-08T17:53:29.464Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-107295\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-08T17:53:16.989703Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-08T17:53:23.662Z\"}}], \"cna\": {\"title\": \"`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that can trigger agent tool execution\", \"source\": {\"advisory\": \"GHSA-h4xc-3qfq-jf93\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"pydantic\", \"product\": \"pydantic-ai\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.34.0, \u003c 1.107.4\"}, {\"status\": \"affected\", \"version\": \"\u003e= 2.0.0b1, \u003c 2.28.0\"}]}, {\"vendor\": \"pydantic\", \"product\": \"pydantic-ai-slim\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.34.0, \u003c 1.107.4\"}, {\"status\": \"affected\", \"version\": \"\u003e= 2.0.0b1, \u003c 2.28.0\"}]}], \"references\": [{\"url\": \"https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93\", \"name\": \"https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/pull/7382\", \"name\": \"https://github.com/pydantic/pydantic-ai/pull/7382\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/pull/7383\", \"name\": \"https://github.com/pydantic/pydantic-ai/pull/7383\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46\", \"name\": \"https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0\", \"name\": \"https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4\", \"name\": \"https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0\", \"name\": \"https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 1.107.4 and 2.28.0, the Agent.to_web() and clai web development chat endpoint has missing request content-type validation. A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval decisions also leave requires_approval=True tools exposed. Binding to localhost does not prevent a browser page from reaching the loopback address. This issue is fixed in versions 1.107.4 and 2.28.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-352\", \"description\": \"CWE-352: Cross-Site Request Forgery (CSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-10-08T17:02:36.718Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-107295\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-08T17:53:29.464Z\", \"dateReserved\": \"2026-10-07T15:53:23.587Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-10-08T17:02:36.718Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.