highclosedpatched
JetBrains TeamCity: JetBrains TeamCity Deserialization of Untrusted Data Vulnerability
› JetBrains TeamCity
Get an email when a new major security incident drops. No spam, unsubscribe any time.
- started
- Aug 5, 2026
- closed
- Aug 5, 2026
- CVEs
- 1
- sources
- 3
## summary
JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol. Added to CISA KEV on 2026-08-05.
severity: Actively exploited (CISA KEV); known ransomware use
## cve ids[1]
## affected
- See vendor advisory / CISA notes (versions not always listed in KEV feed)
## fixed in
- See vendor advisory linked in sources
## timeline[1]
CISA added CVE-2026-63077 to the KEV catalog (due 2026-08-08).
## advisories[2]
## news & write-ups[1]
## notes & caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).
