How severe is CVE-2026-49377?

CVE-2026-49377 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-49377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49377?

CVE-2026-49377 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49377?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-49377 have an EU (EUVD) identifier?

Yes. CVE-2026-49377 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33385.

When was CVE-2026-49377 published?

CVE-2026-49377 was published on 2026-05-29 and last updated on 2026-06-17.

CVE-2026-49377

CVE-2026-49377 is a medium-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-526.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33385
Weakness: CWE-526
Affected product: Jetbrains Teamcity
Published: 2026-05-29
Last modified: 2026-06-17

Description

In JetBrains TeamCity before 2025.11.2 exposure of sensitive data via default agent parameters

Frequently asked questions

What is CVE-2026-49377?: In JetBrains TeamCity before 2025.11.2 exposure of sensitive data via default agent parameters
How severe is CVE-2026-49377?: CVE-2026-49377 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-49377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49377?: CVE-2026-49377 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49377?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-49377 have an EU (EUVD) identifier?: Yes. CVE-2026-49377 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33385.
When was CVE-2026-49377 published?: CVE-2026-49377 was published on 2026-05-29 and last updated on 2026-06-17.

References

https://www.jetbrains.com/privacy-security/issues-fixed/

Affected products (1)

cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*

More vulnerabilities in Jetbrains Teamcity

CVE-2024-27198 — Critical (CVSS 9.8): In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible
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CVE-2022-24340 — Critical (CVSS 9.8): In JetBrains TeamCity before 2021.2.1, XXE during the parsing of the configuration file was possible.
CVE-2022-24331 — Critical (CVSS 9.8): In JetBrains TeamCity before 2021.1.4, GitLab authentication impersonation was possible.

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