JetBrains TeamCity Authentication Bypass Vulnerability
JetBrains TeamCity contains an authentication bypass vulnerability that allows for remote code execution on TeamCity Server.
- Vendor
- JetBrains
- Product
- TeamCity
- CVSS
- 9.8
- EPSS (exploit probability)
- 100.0%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2023-42793 being exploited?
Yes. CISA added CVE-2023-42793 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 100.0% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other JetBrains TeamCity CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2024-27199 JetBrains TeamCity Relative Path Traversal Vulnerabilityransomware use | [ HIGH ] | 7.3 | 100.0% | |
| CVE-2024-27198 JetBrains TeamCity Authentication Bypassransomware usewrite-up | [ CRITICAL ] | 9.8 | 99.9% |