FKIE_CVE-2026-55432
Vulnerability from fkie_nvd - Published: 2026-07-08 01:16 - Updated: 2026-07-08 19:40
Severity
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, the `CreateSubAgent` RPC did not validate a requested app sharing level against the template's `MaxPortSharingLevel` before persisting workspace apps, letting a workspace owner exceed the administrator's configured maximum. Exploitation requires the ability to register sub-agent apps in a workspace the attacker controls. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2clamps the sub-agent app sharing level to the template's `MaxPortSharingLevel`. As a workaround, disable wildcard app hostnames (`CODER_WILDCARD_ACCESS_URL`) to block subdomain-based app routing.
References
{
"affected": [
{
"affectedData": [
{
"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"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*",
"matchCriteriaId": "F97FAF48-192E-4814-82A5-085C44F1D261",
"versionEndExcluding": "2.29.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*",
"matchCriteriaId": "7ABD4A9B-6AE8-47D8-A1B7-91E42EE0481B",
"versionEndExcluding": "2.32.7",
"versionStartIncluding": "2.30.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*",
"matchCriteriaId": "F759EEF3-6EAE-475B-85F8-38E7D7B47438",
"versionEndExcluding": "2.33.8",
"versionStartIncluding": "2.33.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*",
"matchCriteriaId": "397A02BF-6CF6-40B1-B792-D7CB9D229050",
"versionEndExcluding": "2.34.2",
"versionStartIncluding": "2.34.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"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, the `CreateSubAgent` RPC did not validate a requested app sharing level against the template\u0027s `MaxPortSharingLevel` before persisting workspace apps, letting a workspace owner exceed the administrator\u0027s configured maximum. Exploitation requires the ability to register sub-agent apps in a workspace the attacker controls. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2clamps the sub-agent app sharing level to the template\u0027s `MaxPortSharingLevel`. As a workaround, disable wildcard app hostnames (`CODER_WILDCARD_ACCESS_URL`) to block subdomain-based app routing."
}
],
"id": "CVE-2026-55432",
"lastModified": "2026-07-08T19:40:36.780",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5,
"source": "security-advisories@github.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-55432",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-08T12:51:04.699684Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-08T01:16:27.620",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Issue Tracking",
"Patch"
],
"url": "https://github.com/coder/coder/pull/26061"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/coder/coder/releases/tag/v2.29.17"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/coder/coder/releases/tag/v2.32.7"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/coder/coder/releases/tag/v2.33.8"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/coder/coder/releases/tag/v2.34.2"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://github.com/coder/coder/security/advisories/GHSA-x9qq-2qh5-8rxf"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-862"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
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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
| 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.
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