CVE-2026-55076 (GCVE-0-2026-55076)
Vulnerability from cvelistv5
Published
2026-07-07 22:23
Modified
2026-07-08 14:03
CWE
  • CWE-287 - Improper Authentication
  • CWE-704 - Incorrect Type Conversion or Cast
Summary
Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, Coder's OIDC callback checked `email_verified` with a direct Go `bool` type assertion. When an IdP returned the claim as a non-boolean (for example the string `"false"`) or omitted it, the assertion failed open and the email was treated as verified. Combined with an unconditional email-based account fallback, this enabled account takeover. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 coerces `email_verified` across bool, string and numeric types (fail-closed) and blocks the email fallback when the matched user already has a different linked IdP subject. As a workaround, ensure the IdP returns `email_verified` as a native JSON boolean. The email-fallback linking issue has no configuration workaround; upgrading is required.
Impacted products
Vendor Product Version
coder coder Version: >= 2.34.0, < 2.34.2
Version: >= 2.33.0, < 2.33.8
Version: >= 2.30.0, < 2.32.7
Version: < 2.29.17
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Show details on NVD website


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    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55076",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-08T14:03:30.696230Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-07-08T14:03:39.329Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "vendor": "coder",
          "versions": [
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              "status": "affected",
              "version": "\u003e= 2.34.0, \u003c 2.34.2"
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      "descriptions": [
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          "lang": "en",
          "value": "Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, Coder\u0027s OIDC callback checked `email_verified` with a direct Go `bool` type assertion. When an IdP returned the claim as a non-boolean (for example the string `\"false\"`) or omitted it, the assertion failed open and the email was treated as verified. Combined with an unconditional email-based account fallback, this enabled account takeover. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 coerces `email_verified` across bool, string and numeric types (fail-closed) and blocks the email fallback when the matched user already has a different linked IdP subject. As a workaround, ensure the IdP returns `email_verified` as a native JSON boolean. The email-fallback linking issue has no configuration workaround; upgrading is required."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
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          "descriptions": [
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          "descriptions": [
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              "description": "CWE-704: Incorrect Type Conversion or Cast",
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      "providerMetadata": {
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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      "references": [
        {
          "name": "https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvp",
          "tags": [
            "x_refsource_CONFIRM"
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          "url": "https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvp"
        },
        {
          "name": "https://github.com/coder/coder/pull/25712",
          "tags": [
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          "url": "https://github.com/coder/coder/pull/25712"
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        {
          "name": "https://github.com/coder/coder/pull/25713",
          "tags": [
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          "url": "https://github.com/coder/coder/pull/25713"
        },
        {
          "name": "https://github.com/coder/coder/releases/tag/v2.29.17",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/coder/coder/releases/tag/v2.29.17"
        },
        {
          "name": "https://github.com/coder/coder/releases/tag/v2.32.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/coder/coder/releases/tag/v2.32.7"
        },
        {
          "name": "https://github.com/coder/coder/releases/tag/v2.33.8",
          "tags": [
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          "tags": [
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      "source": {
        "advisory": "GHSA-75vm-6w67-gwvp",
        "discovery": "UNKNOWN"
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      "title": "Coder\u0027s OIDC email_verified type coercion bypass enables account takeover via unverified email linking"
    }
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55076",
    "datePublished": "2026-07-07T22:23:26.179Z",
    "dateReserved": "2026-06-16T14:33:35.711Z",
    "dateUpdated": "2026-07-08T14:03:39.329Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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