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01 Record

CVE-2026-100260

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

MediumPUBLISHEDCNA: JetBrains
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.26% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 18.2% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-02.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-30 15:17Z28 DAYS AGO
Last updated
2026-09-30 15:48Z28 DAYS AGO
Reserved
2026-09-25
Assigning CNA
JetBrains
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weaknesses
  • CWE-1188Initialization of a Resource with an Insecure DefaultBase
Data version
5.2
Document digest
89bb62c3e4411b0832d1ab58f2cffe64f2a20dc306a83a67912b788ef3fcd3d6

05 Affected products

VendorProductVersionsPlatforms
JetBrainsYouTrack0 to < 2026.2.18991—

06 References