CVE-2026-63077
Deserialization of Untrusted Data in JetBrains TeamCity. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 5 August 2026.
- Product
- JetBrains TeamCity
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- Known to be used in ransomware
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.
More from JetBrains this year.
- CVE-2024-27199 Relative Path Traversal, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.