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01 Record

CVE-2026-1181

Altium 365 Over-Permissive CORS Configuration Allows Credentialed Cross-Origin Workspace Access

CriticalPUBLISHEDCNA: Altium
CNA base score9.0 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

02 Description

Altium 365 Over-Permissive CORS Configuration Allows Credentialed Cross-Origin Workspace Access

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 ImpacttotalSuccessful exploitation gives total 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
0.35% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 28.3% of scored records. A rank, not a probability.
NVD base score
9.0 (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:C/C:H/I:H/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
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
2026-01-19 12:00Z9 MO AGO
Last updated
2026-01-26 21:20Z9 MO AGO
Reserved
2026-01-19
Assigning CNA
Altium
Record state
PUBLISHED
Severity
Critical (CVSS 9.0)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weaknesses
  • CWE-284Improper Access ControlPillar
  • CWE-942Permissive Cross-domain Security Policy with Untrusted DomainsVariant
Data version
5.2
Document digest
4059e33829318785c0d53fdfaa7e77f4e68755f0c9f41da631fefcd390ea79f5

05 Affected products

VendorProductVersionsPlatforms
AltiumAltium 365Not specifiedWeb

06 References