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TI-2026-45031 Aliases CVE-2026-63077GHSA-94gx-v738-fx9w

Deserialization of untrusted data in JetBrains TeamCity

Priority CRITICAL 100Exploited in the wildCWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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

Why it matters now

Exploitation Active In CISA KEV since 2026-08-05CISA due date 2026-08-08Known ransomware use
EPSS 0.94887 99th percentileScored 2026-11-07
Fix Fixed TeamCity (JetBrains): 2026.1.3, 2025.11.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsTeamCitybefore 2026.1.3, 2025.11.72026.1.3, 2025.11.7Patch availableCNA
  • TeamCity VendorJetBrains Affected before 2026.1.3, 2025.11.7 Fixed in 2026.1.3, 2025.11.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*before 2025.11.7; 2026.1 to before 2026.1.3VulnerableJetBrains
  • cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:* Versions before 2025.11.7; 2026.1 to before 2026.1.3 Vulnerable ·JetBrains

Remediation

  • Fix · CNA TeamCity (JetBrains) Fixed in 2026.1.3, 2025.11.7

Timeline

  1. 2026-08-05 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-63077
  3. 2026-10-03 Alias added: GHSA-94gx-v738-fx9w

References

Advisory 1

  • TI-2024-18053 In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-22884 In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18054 In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible KEVCVSS 3.1HIGH 7.3
  • TI-2024-15905 In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible CVSS 3.1CRITICAL 9.8
  • TI-2015-01192 JetBrains TeamCity 8 and 9 before 9.0.2 allows bypass of account-creation restrictions… CVSS 3.1MEDIUM 6.5
  • TI-2026-36546 In JetBrains TeamCity before 2026.1 remote code execution was possible via Perforce connection settings CVSS 3.1HIGH 8.8
See all 282 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences