{"id":"CVE-2026-118687","aliases":[],"cve":{"records":[{"id":"CVE-2026-118687","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-28T17:31:29.498Z","published":"2026-10-28T18:59:56.265Z","modified":"2026-10-29T20:54:16.473Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-28T18:59:56.265Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T20:54:16.473Z"}],"references":[{"url":"https://github.com/coder/coder/security/advisories/GHSA-24vh-q7rg-243w","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/coder-before-2.29.21-2.34.12-2.35.9-2.36.7-and-2.37.4-missing-audience-validation-in-gcp-instance-identity-authentication","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-441","description":"Unintended Proxy or Intermediary ('Confused Deputy')","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.37.0","versionEndExcluding":"2.37.4"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.36.0","versionEndExcluding":"2.36.7"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.35.0","versionEndExcluding":"2.35.9"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionStartIncluding":"2.30.0","versionEndExcluding":"2.34.12"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*","versionEndExcluding":"2.29.21"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-29T15:28:59.226439Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Coder before 2.29.21, 2.34.12, 2.35.9, 2.36.7, and 2.37.4 Missing Audience Validation in GCP Instance-Identity Authentication","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"Coder before 2.29.21, 2.30.0 before 2.34.12, 2.35.0 before 2.35.9, 2.36.0 before 2.36.7, and 2.37.0 before 2.37.4 does not validate the audience claim of GCE instance-identity JWTs at the POST /api/v2/workspaceagents/google-instance-identity endpoint. Attackers who obtain an unexpired format=full identity token minted for another relying party can replay it to obtain that workspace agent's session token, which remains valid until the workspace's next build.","score":8.3,"severity":"high","published":"2026-10-28T18:59:56.265Z","modified":"2026-10-29T20:54:16.473Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.37.0","status":"affected","lessThan":"2.37.4","versionType":"semver"},{"version":"2.37.4","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-2026-118687"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.36.0","status":"affected","lessThan":"2.36.7","versionType":"semver"},{"version":"2.36.7","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-2026-118687"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.35.0","status":"affected","lessThan":"2.35.9","versionType":"semver"},{"version":"2.35.9","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-2026-118687"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"2.30.0","status":"affected","lessThan":"2.34.12","versionType":"semver"},{"version":"2.34.12","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-2026-118687"},{"vendor":"coder","name":"coder","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"2.29.21","versionType":"semver"},{"version":"2.29.21","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-2026-118687"}],"remediation":[],"references":["https://github.com/coder/coder/security/advisories/GHSA-24vh-q7rg-243w","https://www.vulncheck.com/advisories/coder-before-2.29.21-2.34.12-2.35.9-2.36.7-and-2.37.4-missing-audience-validation-in-gcp-instance-identity-authentication"],"sources":[{"name":"CVE","id":"CVE-2026-118687","modified":"2026-10-29T20:54:16.473Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118687"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":8.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","score":6.5}],"sourceAffected":[],"observedAt":"2026-10-29T21:32:47.670Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T07:50:32.196Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T02:00:30.495Z","attemptedAt":"2026-10-30T02:00:30.495Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T02:00:30.594Z","attemptedAt":"2026-10-30T02:00:30.594Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T02:00:30.495Z","attemptedAt":"2026-10-30T02:00:30.495Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T02:00:30.495Z","attemptedAt":"2026-10-30T02:00:30.495Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-118687","url":"https://www.first.org/epss/","probability":0.00186,"percentile":0.08204,"date":"2026-10-29","checkedAt":"2026-10-30T02:00:30.495Z"},{"source":"ENISA EUVD","id":"EUVD-2026-112392","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112392","modified":"Oct 29, 2026, 8:54:16 PM","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","checkedAt":"2026-10-30T02:00:30.495Z"},{"source":"NVD","id":"CVE-2026-118687","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118687","modified":"2026-10-29T21:17:16.610","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/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":"2026-10-30T02:00:30.495Z"},{"source":"NVD","id":"CVE-2026-118687","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118687","modified":"2026-10-29T21:17:16.610","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-10-30T02:00:30.495Z"},{"source":"GitHub Advisory Database","id":"GHSA-j9wc-wg7r-6rm3","url":"https://github.com/advisories/GHSA-j9wc-wg7r-6rm3","modified":"2026-10-28T21:31:25Z","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","checkedAt":"2026-10-30T02:00:30.594Z"}],"aiSummary":{"text":"Coder versions before 2.29.21, 2.34.12, 2.35.9, 2.36.7, and 2.37.4 have a missing audience validation weakness in GCP instance-identity authentication. Attackers may replay an unexpired identity token to obtain a workspace agent's session token. The weakness is described as an unintended proxy or intermediary issue.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:42:15.570Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-118687"}]}}