{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "TeamCity", "vendor": "JetBrains", "versions": [{"lessThan": "2026.1.3, 2025.11.7", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cve@jetbrains.com"}], "cisaActionDue": "2026-08-08", "cisaExploitAdd": "2026-08-05", "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "cisaVulnerabilityName": "JetBrains TeamCity Deserialization of Untrusted Data Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*", "matchCriteriaId": "4F865D53-6163-4A62-B8C1-06F45DA28E3C", "versionEndExcluding": "2025.11.7", "vulnerable": true}, {"criteria": "cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*", "matchCriteriaId": "4CD39F06-B4AA-4300-B763-9362E98D50D6", "versionEndExcluding": "2026.1.3", "versionStartIncluding": "2026.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol"}, {"lang": "es", "value": "En JetBrains TeamCity antes de 2026.1.3, 2025.11.7 era posible la ejecuci\u00f3n remota de c\u00f3digo no autenticada a trav\u00e9s del protocolo de sondeo del agente."}], "id": "CVE-2026-63077", "lastModified": "2026-10-24T13:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "cve@jetbrains.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63077", "options": [{"exploitation": "active"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-27T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-07-27T17:16:38.830", "references": [{"source": "cve@jetbrains.com", "tags": ["Vendor Advisory"], "url": "https://www.jetbrains.com/privacy-security/issues-fixed/"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-63077"}], "sourceIdentifier": "cve@jetbrains.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "cve@jetbrains.com", "type": "Secondary"}]}