How severe is CVE-2026-100278?

CVE-2026-100278 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-100278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-100278?

CVE-2026-100278 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-100278?

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

When was CVE-2026-100278 published?

CVE-2026-100278 was published on 2026-09-30 and last updated on 2026-10-02.

CVE-2026-100278

CVE-2026-100278 is a medium-severity vulnerability in Jetbrains Youtrack with a CVSS 3.x base score of 4.9. 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 4.9)
EPSS exploit prediction: 0% (13th 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 users with restricted permission could edit and hide other users' comments

Frequently asked questions

What is CVE-2026-100278?: In JetBrains YouTrack before 2026.2.19197 users with restricted permission could edit and hide other users' comments
How severe is CVE-2026-100278?: CVE-2026-100278 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-100278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-100278?: CVE-2026-100278 affects Jetbrains Youtrack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-100278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-100278 published?: CVE-2026-100278 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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