Occurred Aug 5, 2026, 12:00:00 AM UTC

First published Oct 27, 2026, 8:20:16 PM UTC · Last updated Oct 27, 2026, 8:20:16 PM UTC

CVE-2026-63077: JetBrains TeamCity Deserialization of Untrusted Data Vulnerability

Reported by CISA Known Exploited Vulnerabilities

The source reports that CVE-2026-63077 in JetBrains TeamCity could allow unauthenticated remote code execution and calls for mitigations or discontinuing use if mitigations are unavailable.

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Why it matters

The source calls for mitigation and risk-based patching of the reported vulnerability.

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 6/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 2/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 3/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 5/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

CISA Known Exploited Vulnerabilities CVE-2026-63077: JetBrains TeamCity Deserialization of Untrusted Data Vulnerability

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