How severe is CVE-2026-100276?

CVE-2026-100276 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-100276 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-100276?

CVE-2026-100276 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-100276?

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

When was CVE-2026-100276 published?

CVE-2026-100276 was published on 2026-09-30 and last updated on 2026-10-02.

CVE-2026-100276

CVE-2026-100276 is a medium-severity vulnerability in Jetbrains Youtrack with a CVSS 3.x base score of 5.9. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Jetbrains Youtrack
Published: 2026-09-30
Last modified: 2026-10-02

Description

In JetBrains YouTrack before 2026.2.19197 guest users could remove a workflow action's visibility restriction and run the action

Frequently asked questions

What is CVE-2026-100276?: In JetBrains YouTrack before 2026.2.19197 guest users could remove a workflow action's visibility restriction and run the action
How severe is CVE-2026-100276?: CVE-2026-100276 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-100276 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-100276?: CVE-2026-100276 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-100276?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-100276 published?: CVE-2026-100276 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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