How severe is CVE-2026-100264?

CVE-2026-100264 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-100264 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-100264?

CVE-2026-100264 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-100264?

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

When was CVE-2026-100264 published?

CVE-2026-100264 was published on 2026-09-30 and last updated on 2026-10-02.

CVE-2026-100264

CVE-2026-100264 is a low-severity vulnerability in Jetbrains Youtrack with a CVSS 3.x base score of 2.7. 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-522.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Jetbrains Youtrack
Published: 2026-09-30
Last modified: 2026-10-02

Description

In JetBrains YouTrack before 2026.2.18991 stored SMTP server credentials could be disclosed by changing the server host

Frequently asked questions

What is CVE-2026-100264?: In JetBrains YouTrack before 2026.2.18991 stored SMTP server credentials could be disclosed by changing the server host
How severe is CVE-2026-100264?: CVE-2026-100264 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-100264 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-100264?: CVE-2026-100264 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-100264?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-100264 published?: CVE-2026-100264 was published on 2026-09-30 and last updated on 2026-10-02.

References

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

Affected products (1)

cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*

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