KEV Entry

CVE-2026-63077

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2026-63077

2026-08-05 00:00 UTC

Timestamps

2026-08-05

2026-08-05

Scope

JetBrains TeamCity Deserialization of Untrusted Data Vulnerability | Affected: JetBrains / TeamCity | Description: JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (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. | Due date: 2026-08-08 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://blog.jetbrains.com/teamcity/2026/07/cve-2026-63077/; https://www.jetbrains.com/privacy-security/issues-fixed/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-63077

References
  • {'id': 'CVE-2026-63077', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-63077'}

326e4a41-68fa-4df5-8762-e7ed3bc289fc

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-08-05 18:00 UTC

2026-08-05 18:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-502"
  ],
  "date_added": "2026-08-05",
  "due_date": "2026-08-08",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "TeamCity",
  "vendorProject": "JetBrains",
  "vulnerabilityName": "JetBrains TeamCity Deserialization of Untrusted Data Vulnerability"
}
 -
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