{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55431", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T21:59:57.017Z", "datePublished": "2026-07-08T00:10:49.165Z", "dateUpdated": "2026-07-08T00:10:49.165Z"}, "containers": {"cna": {"title": "Coder's session token leaked to arbitrary hosts via `coder open app` for external workspace apps", "problemTypes": [{"descriptions": [{"cweId": "CWE-522", "lang": "en", "description": "CWE-522: Insufficiently Protected Credentials", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-601", "lang": "en", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/coder/coder/security/advisories/GHSA-v54h-cp2w-9x4g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/coder/coder/security/advisories/GHSA-v54h-cp2w-9x4g"}, {"name": "https://github.com/coder/coder/pull/26146", "tags": ["x_refsource_MISC"], "url": "https://github.com/coder/coder/pull/26146"}, {"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"}], "affected": [{"vendor": "coder", "product": "coder", "versions": [{"version": ">= 2.34.0, < 2.34.2", "status": "affected"}, {"version": ">= 2.33.0, < 2.33.8", "status": "affected"}, {"version": ">= 2.30.0, < 2.32.7", "status": "affected"}, {"version": "< 2.29.17", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T00:10:49.165Z"}, "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 open app` opens external workspace-app URLs without validating the scheme or host. When an external app URL contains the `$SESSION_TOKEN` placeholder the CLI replaces it with the user's real session token before handing the URL to the OS open handler. Practical exploitation requires the victim to run `coder open app` against a workspace whose external app definition the attacker controls. Only a malicious template author can control external app URLs. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 applies a URL-scheme allowlist in the CLI and limits `$SESSION_TOKEN` substitution to trusted destinations like the web frontend. As a workaround, avoid running `coder open app` for untrusted workspaces."}], "source": {"advisory": "GHSA-v54h-cp2w-9x4g", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.34.0,2.34.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.33.0,2.33.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.30.0,2.32.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.29.17)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "coder", "source": "cna", "vendor": "coder"}, "product": "coder", "vendor": "coder"}], "created": "2026-07-08T02:30:16.598471+00:00", "updated": "2026-07-08T02:30:16.598489+00:00", "vendors": ["coder", "coder$PRODUCT$coder"]}