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01 Record

CVE-2026-86484

In JetBrains YouTrack before 2026.2.18634 angularJS template injection in assignee names led to stored XSS

MediumPUBLISHEDCNA: JetBrains
CNA base score4.6 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

02 Description

In JetBrains YouTrack before 2026.2.18634 angularJS template injection in assignee names led to stored XSS

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.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • 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
0.64% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 50.6% of scored records. A rank, not a probability.
NVD base score
4.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-09-08.
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
2026-09-07 16:26Z1 MO AGO
Last updated
2026-09-08 10:35Z1 MO AGO
Reserved
2026-09-07
Assigning CNA
JetBrains
Record state
PUBLISHED
Severity
Medium (CVSS 4.6)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
a44762e6e820f42a3b5adac310cc223a2ffbfee8b0ee3b919ca4c075148bdde7

05 Affected products

VendorProductVersionsPlatforms
JetBrainsYouTrack0 to < 2026.2.18634—

06 References