Critical 9.8Known exploited (CISA KEV)Published Jul 27, 2026

CVE-2026-63077In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects JetBrains TeamCity. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Aug 5, 2026; federal agencies had to remediate by Aug 8, 2026, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for JetBrains TeamCity

Exploited in the last 30 days

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Added to CISA KEV Aug 5, 2026; federal remediation due Aug 8, 2026; known ransomware useApply 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.
EPSS (exploitation in the next 30 days): 89.57% (percentile 100)
Assigned by: JetBrains
NVD analysis: Analyzed
Record last updated: Sep 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

JetBrains TeamCity jetbrains:teamcity (from the name)	before 2026.1.3, 2025.11.7	CNA record
jetbrains teamcity jetbrains:teamcity	before 2025.11.7; from 2026.1 before 2026.1.3	NVD

References

https://www.jetbrains.com/privacy-security/issues-fixed/vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-63077us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.