CVE-2026-63077 | BDVDB-2026-352939 Detail

JetBrainsTeamCity

Description#

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

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-502 Deserialization of Untrusted Data

References#

Exploit#

No public exploit known

History#

Version 12026-07-27Record published in the CVE List.
Version 22026-09-23Most recent update recorded in the CVE List.

Published

Published: 2026-07-27
Last modified: 2026-09-23

Vendor information

Vendor: JetBrains
Product: TeamCity

All JetBrains vulnerabilities

Score

9.8 Critical

EPSS

94.8%, Very High

Estimated chance of exploitation in the next 30 days. EPSS percentile: 99.9.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Insecure Deserialization

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.

Affected Systems

Vulnerable
< 2026.1.3, 2025.11.7
Fixed
2026.1.3, 2025.11.7

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).