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01 Record

CVE-2026-100265

In JetBrains Rider before 2026.2.1 aI Assistant could auto-update third-party skills without user confirmation

MediumPUBLISHEDCNA: JetBrains
CNA base score4.8 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

02 Description

In JetBrains Rider before 2026.2.1 aI Assistant could auto-update third-party skills without user confirmation

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
0.10% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 0.9% of scored records. A rank, not a probability.
NVD base score
6.5 (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:L/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 15:17Z29 DAYS AGO
Last updated
2026-09-30 15:48Z29 DAYS AGO
Reserved
2026-09-25
Assigning CNA
JetBrains
Record state
PUBLISHED
Severity
Medium (CVSS 4.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
  • CWE-494Download of Code Without Integrity CheckBase
Data version
5.2
Document digest
cc677078e33c2a870d2a19b26ed91a8b7958e2e66f4371419f0fda05c4a58d39

05 Affected products

VendorProductVersionsPlatforms
JetBrainsRider0 to < 2026.2.1—

06 References