netVigilance Vulnerability intelligence since 2004
CVE-2026-63077 · netVigilance record NV26-0177

JetBrains TeamCity Deserialization of Untrusted Data

past due

What to do

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.

CISA deadline 2026-08-08 · passed 33 days ago · applies to US federal civilian agencies; used elsewhere as a reference SLA

What happened

JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.

Who is affected

JetBrains TeamCity. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.

Weakness class: CWE-502.

Timeline

  1. Added to CISA KEVExploitation in the wild confirmed by CISA
  2. CISA remediation deadlinepassed 33 days ago

Sources