Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-100255

CVE-2026-100255CRITICAL

JetBrains TeamCity — In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was possible via password reset

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0034   24.7     —

AFFECTED
  Product   Versions     Fixed
  TeamCity  unspecified  —

TIMELINE
  Sep 25  Reserved by JetBrains
  Sep 30  Published (CNA: JetBrains)
  Oct 2   RESCORED — CVE-2026-100255 (JetBrains TeamCity). CVSS 8.1 → 9.8 (NVD).

CWE-1289 · CNA: JetBrains · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was possible via password reset

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 25, 2026	Reserved	Reserved by JetBrains
September 30, 2026	Published	Published (CNA: JetBrains)
October 2, 2026	RESCORED	RESCORED — CVE-2026-100255 (JetBrains TeamCity). CVSS 8.1 → 9.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
JetBrains	TeamCity	—	—	—

Weaknesses

CWE-1289

References (1)

https://www.jetbrains.com/privacy-security/issues-fixed/ [Vendor Advisory]

Authoritative record: CVE-2026-100255 at cve.org

Vendors: jetbrains

Weaknesses: CWE-1289

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-100255 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.