CVE-2026-11326 (GCVE-0-2026-11326)

Vulnerability from cvelistv5 – Published: 2026-06-05 00:12 – Updated: 2026-06-05 00:12
VLAI
Summary
OpenAI Atlas before 1.2025.288.15 exposed privileged browser APIs to web content on *.openai.com origins. A cross-site scripting vulnerability in forum.openai.com could be used to access these functions, allowing access to browser history information and the ability to open or close tabs. OpenAI Atlas 1.2025.288.15 narrows access to these APIs to *.chatgpt.com; users should upgrade to 1.2025.288.15 or later.
Severity
No CVSS data available.
CWE
  • CWE-284 - Improper Access Control
Assigner
OAI
References
Impacted products
Vendor Product Version
OpenAI OpenAI Atlas Affected: 0 , < 1.2025.288.15 (custom)
Create a notification for this product.
Credits
s1r1us and sudi of hacktron.ai
Show details on NVD website
To clipboard 

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    "cna": {
      "affected": [
        {
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          "product": "OpenAI Atlas",
          "vendor": "OpenAI",
          "versions": [
            {
              "lessThan": "1.2025.288.15",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "s1r1us and sudi of hacktron.ai"
        }
      ],
      "descriptions": [
        {
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          "value": "OpenAI Atlas before 1.2025.288.15 exposed privileged browser APIs to web content on *.openai.com origins. A cross-site scripting vulnerability in forum.openai.com could be used to access these functions, allowing access to browser history information and the ability to open or close tabs. OpenAI Atlas 1.2025.288.15 narrows access to these APIs to *.chatgpt.com; users should upgrade to 1.2025.288.15 or later."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-05T00:12:32.077Z",
        "orgId": "8f4f43ab-ba69-4d92-aa1d-d772184d6fb7",
        "shortName": "OAI"
      },
      "references": [
        {
          "name": "Pwning OpenAI Atlas Through Exposed Browser Internals",
          "tags": [
            "technical-description"
          ],
          "url": "https://www.hacktron.ai/blog/hacking-openai-atlas-browser"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to OpenAI Atlas 1.2025.288.15 or later."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8f4f43ab-ba69-4d92-aa1d-d772184d6fb7",
    "assignerShortName": "OAI",
    "cveId": "CVE-2026-11326",
    "datePublished": "2026-06-05T00:12:32.077Z",
    "dateReserved": "2026-06-05T00:07:13.696Z",
    "dateUpdated": "2026-06-05T00:12:32.077Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-11326\",\"sourceIdentifier\":\"8f4f43ab-ba69-4d92-aa1d-d772184d6fb7\",\"published\":\"2026-06-05T02:17:11.180\",\"lastModified\":\"2026-06-05T02:17:11.180\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"OpenAI Atlas before 1.2025.288.15 exposed privileged browser APIs to web content on *.openai.com origins. A cross-site scripting vulnerability in forum.openai.com could be used to access these functions, allowing access to browser history information and the ability to open or close tabs. OpenAI Atlas 1.2025.288.15 narrows access to these APIs to *.chatgpt.com; users should upgrade to 1.2025.288.15 or later.\"}],\"metrics\":{},\"weaknesses\":[{\"source\":\"8f4f43ab-ba69-4d92-aa1d-d772184d6fb7\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]}],\"references\":[{\"url\":\"https://www.hacktron.ai/blog/hacking-openai-atlas-browser\",\"source\":\"8f4f43ab-ba69-4d92-aa1d-d772184d6fb7\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.