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CVE-2026-100255

JetBrains Teamcity vulnerability

8.1 HIGHEPSS 0.35%
  1. Published30 Sept 2026

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

JetBrains Teamcity≥ 2026.1 < 2026.1.4 · < 2025.11.8

Remediation

Fixed in
JetBrains Teamcity≥ 2026.1.4

References

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Frequently asked

Is CVE-2026-100255 being actively exploited?

CVE-2026-100255 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.35%.

How severe is CVE-2026-100255?

CVE-2026-100255 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.35% probability of exploitation.

Which products are affected by CVE-2026-100255?

Affected products include JetBrains Teamcity.

How do I fix CVE-2026-100255?

Upgrade affected software to a fixed version, for example JetBrains Teamcity 2026.1.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-100255 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.