Vendor
JetBrains: actively exploited vulnerabilities
4 vulnerabilities in JetBrains products are listed in CISA’s catalog of actively exploited vulnerabilities, 4 of them used by ransomware. Latest addition on August 5, 2026: CVE-2026-63077 (TeamCity).
- 4 exploited vulnerabilities in the catalog
- 2 added in the last 12 months
- 4 used by ransomware
- 1 product affected
Affected products
- TeamCity4
All exploited vulnerabilities
CISA KEV catalog, newest first: each entry corresponds to observed exploitation.
2026 2 vulnerabilities
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CVE-2026-63077Used by ransomwareJetBrains TeamCity Deserialization of Untrusted Data Vulnerability
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CVE-2024-27199Used by ransomwareJetBrains TeamCity Relative Path Traversal Vulnerability
2024 1 vulnerability
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CVE-2024-27198Used by ransomwareJetBrains TeamCity Authentication Bypass Vulnerability
2023 1 vulnerability
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CVE-2023-42793Used by ransomwareJetBrains TeamCity Authentication Bypass Vulnerability
What to do
If your estate includes any of these products, make sure the vendor’s patches are applied, starting with the most recent vulnerabilities and those used by ransomware, then look for signs of compromise: an exploited vulnerability has often been used before it was fixed.
Additions from all vendors are tracked on the Actively exploited vulnerabilities page, updated several times a day. Sources: CISA KEV catalog (US public domain) and CERT-FR.