{"id":"CVE-2026-126308","aliases":[],"cve":{"records":[{"id":"CVE-2026-126308","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-10T20:16:44.443Z","published":"2026-11-13T09:36:20.400Z","modified":"2026-11-13T09:36:20.400Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-13T09:36:20.400Z"}],"references":[{"url":"https://github.com/coder/coder/security/advisories/GHSA-2x8w-q434-f76p","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/coder-2.38.0-before-2.38.2-session-token-leak-via-sub-agent-external-apps","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-201","description":"Insertion of Sensitive Information Into Sent Data","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.38.0","versionEndExcluding":"2.38.2"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.37.0","versionEndExcluding":"2.37.6"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.36.0","versionEndExcluding":"2.36.9"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.30.0","versionEndExcluding":"2.34.14"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.24.0","versionEndExcluding":"2.29.23"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.35.0","versionEndExcluding":"2.36.0"}]}]}]}],"prioritization":[]},"title":"Coder 2.38.0 before 2.38.2 Session Token Leak via Sub-Agent External Apps","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"The web dashboard in Coder 2.24.0 before 2.29.23, 2.30.0 before 2.34.14, 2.35.0 before 2.36.9, 2.37.0 before 2.37.6, and 2.38.0 before 2.38.2 replaces the $SESSION_TOKEN placeholder in external app URLs with a full-access API key without checking whether the app belongs to a sub-agent. Code running in a workspace can register a disguised sub-agent app with a custom protocol URL, so the owner's click sends their API key to an attacker-chosen destination.","score":8.7,"severity":"high","published":"2026-11-13T09:36:20.400Z","modified":"2026-11-13T09:36:20.400Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.38.0","status":"affected","lessThan":"2.38.2","versionType":"semver"},{"version":"2.38.2","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.37.0","status":"affected","lessThan":"2.37.6","versionType":"semver"},{"version":"2.37.6","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.36.0","status":"affected","lessThan":"2.36.9","versionType":"semver"},{"version":"2.36.9","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.30.0","status":"affected","lessThan":"2.34.14","versionType":"semver"},{"version":"2.34.14","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.24.0","status":"affected","lessThan":"2.29.23","versionType":"semver"},{"version":"2.29.23","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.35.0","status":"affected","lessThan":"2.36.0","versionType":"semver"},{"version":"2.36.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/coder/coder/v2","packageIdentity":{"ecosystem":"Go","name":"github.com/coder/coder/v2"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"}],"remediation":[],"references":["https://github.com/coder/coder/security/advisories/GHSA-2x8w-q434-f76p","https://www.vulncheck.com/advisories/coder-2.38.0-before-2.38.2-session-token-leak-via-sub-agent-external-apps"],"sources":[{"name":"CVE","id":"CVE-2026-126308","modified":"2026-11-13T09:36:20.400Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","score":7.7}],"sourceAffected":[],"observedAt":"2026-11-13T13:25:42.623Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T04:55:31.932Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-13T14:25:55.024Z","attemptedAt":"2026-11-13T14:25:55.024Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-13T14:30:32.148Z","attemptedAt":"2026-11-13T14:30:32.148Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-13T14:30:32.150Z","attemptedAt":"2026-11-13T14:30:32.150Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-13T14:30:31.891Z","attemptedAt":"2026-11-13T14:30:31.891Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-126308","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126308","modified":"2026-11-13T10:17:36.320","score":8.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-13T14:25:55.024Z"},{"source":"NVD","id":"CVE-2026-126308","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126308","modified":"2026-11-13T10:17:36.320","score":7.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","checkedAt":"2026-11-13T14:25:55.024Z"},{"source":"GitHub Advisory Database","id":"GHSA-h95g-897g-9949","url":"https://github.com/advisories/GHSA-h95g-897g-9949","modified":"2026-11-13T12:31:23Z","score":7.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","checkedAt":"2026-11-13T14:30:32.148Z"},{"source":"ENISA EUVD","id":"EUVD-2026-125212","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-125212","modified":"Nov 13, 2026, 9:36:20 AM","score":8.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","checkedAt":"2026-11-13T14:30:32.150Z"}],"aiSummary":{"text":"Coder versions 2.24.0 to 2.29.23, 2.30.0 to 2.34.14, 2.35.0 to 2.36.9, 2.37.0 to 2.37.6, and 2.38.0 to 2.38.1 have a session token leak via sub-agent external apps. An attacker can register a disguised sub-agent app to send the owner's API key to an attacker-chosen destination.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T13:36:34.072Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-126308"}]}}