No exploitation reportedFix available

CVE-2026-100276

Q: Is CVE-2026-100276 actively exploited?

Active exploitation of CVE-2026-100276 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-100276?

CVE-2026-100276 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Guest users able to bypass workflow visibility restrictions in JetBrains YouTrack

No exploitation reported by the sources we read.

Published2026-09-30
Fixed in2026.2.19197
WeaknessCWE-863

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2026-09-3016:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-100276?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-100276?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Jetbrains youtrack

Branch	Affected	Fixed in	Source
2026.2	< 2026.2.19197	2026.2.19197	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Jetbrains youtrack to 2026.2.19197

Advisories and patches

www.jetbrains.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-09-30
OpenCVESSVC decisionnone—
CNACVSS 3.15.9read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
NVDweakness (CWE)CWE-863read 2026-10-23
FIRST EPSSEPSS score0.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2026-09-30
Last Modified: 2026-10-02
NVD status: Analyzed

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

Is CVE-2026-100276 actively exploited?

Active exploitation of CVE-2026-100276 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-100276?

CVE-2026-100276 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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