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VulnerabilityPublished

CVE-2026-100275: JetBrains YouTrack · Cross-site Scripting

Affects JetBrains YouTrackSource CVE Database V5

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Not known to be exploited · CVSS 6.9 Medium : upgrade to 2026.2.19197 when convenient.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 3.1 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2026.2.19197
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.

What to do

Upgrade JetBrains YouTrack to 2026.2.19197.

Affected software

ProductAffectedFixed in
JetBrainsYouTrackAffected
  • <2026.2.19197
Fixed in
  • 2026.2.19197

AI-suggested

A fix is available in JetBrains YouTrack version 2026.2.19197. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.

Description

In JetBrains YouTrack before 2026.2.19197 stored XSS in the workflow error notification toast was possible

References

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