CVE-2026-55076 (GCVE-0-2026-55076)
Vulnerability from cvelistv5
Published
2026-07-07 22:23
Modified
2026-07-08 14:03
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
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Impacted products
{
"containers": {
"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"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-08T14:03:39.329Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "coder",
"vendor": "coder",
"versions": [
{
"status": "affected",
"version": "\u003e= 2.34.0, \u003c 2.34.2"
},
{
"status": "affected",
"version": "\u003e= 2.33.0, \u003c 2.33.8"
},
{
"status": "affected",
"version": "\u003e= 2.30.0, \u003c 2.32.7"
},
{
"status": "affected",
"version": "\u003c 2.29.17"
}
]
}
],
"descriptions": [
{
"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"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287: Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-704",
"description": "CWE-704: Incorrect Type Conversion or Cast",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-07T22:23:26.179Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvp"
},
{
"name": "https://github.com/coder/coder/pull/25712",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/coder/coder/pull/25712"
},
{
"name": "https://github.com/coder/coder/pull/25713",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/coder/coder/pull/25713"
},
{
"name": "https://github.com/coder/coder/releases/tag/v2.29.17",
"tags": [
"x_refsource_MISC"
],
"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": [
"x_refsource_MISC"
],
"url": "https://github.com/coder/coder/releases/tag/v2.33.8"
},
{
"name": "https://github.com/coder/coder/releases/tag/v2.34.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/coder/coder/releases/tag/v2.34.2"
}
],
"source": {
"advisory": "GHSA-75vm-6w67-gwvp",
"discovery": "UNKNOWN"
},
"title": "Coder\u0027s OIDC email_verified type coercion bypass enables account takeover via unverified email linking"
}
},
"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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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.
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