CISA KEV 05 Aug 2026: 1 exploited flaw in JetBrains

Conceptual illustration: Interconnected glass software-repository cubes and deployment packages, a metal access key and a protected supply-chain link. Headline: DEVOPS SECURITY.

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On 5 August 2026, CISA added 1 actively exploited vulnerability affecting JetBrains to its Known Exploited Vulnerabilities catalog. If you run any of these products, patch or mitigate now — exploitation is already happening.

CVE-2026-63077Known ransomware useFederal deadline 08 Aug 2026

JetBrains TeamCity Deserialization of Untrusted Data Vulnerability

JetBrains / TeamCity / CWE-502

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.

blog.jetbrains.com · jetbrains.com · nvd.nist.gov

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JetBrains TeamCity Deserialization of Untrusted Data Vulnerability