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VulnerabilityPublished

CVE-2026-100260: JetBrains YouTrack · Insecure Default

Affects JetBrains YouTrackSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 2026.2.18991 when convenient.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2026.2.18991
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 YouTrack and com.jetbrains/youtrack to 2026.2.18991.

Affected software

ProductAffectedFixed in
JetBrainsYouTrackAffected
  • <2026.2.18991
Fixed in
  • 2026.2.18991
Mavencom.jetbrains/youtrackpkg:maven/com.jetbrains/youtrackOther threatsAffected
  • <2026.2.18991
Fixed in
  • 2026.2.18991

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on user action to apply the update.

Description

In JetBrains YouTrack before 2026.2.18991 mailbox integration allowed authentication after a password reset

References

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