Live › vulnerability › CVE-2026-63077
Go to dashboardJetBrains TeamCity has a deserialization of untrusted data flaw that lets an unauthenticated remote attacker run code on the server through the agent polling protocol. CISA lists it as actively exploited in the wild, with ransomware use noted in the source tags.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| jetbrains teamcity | vendor | < 2025.11.7 | 2025.11.7 |
| jetbrains teamcity | vendor | >= 2026.1, < 2026.1.3 | 2026.1.3 |
| JetBrains TeamCity | vendor | – | – |
Identify every TeamCity server version in use and check whether its agent polling port is reachable from the internet or untrusted networks; the sources do not give an affected version range or a specific command.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.
CISA 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.
This page as .md · .json · in your agent: get_signal("CVE-2026-63077")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.