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01 Record

CVE-2026-106491

Backstage: Improper input validation in proxy-backend

MediumPUBLISHEDCNA: GitHub_M
CNA base score6.4 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

02 Description

Backstage: Improper input validation in proxy-backend

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
Not scored by EPSS
EPSS percentile
Not scored by EPSS
NVD base score
The NVD has published no score for this record
NVD CVSS vector
No NVD score to derive
NVD analysis status
Not recorded
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
2026-10-06 20:45Z1 HR AGO
Last updated
2026-10-06 20:45Z1 HR AGO
Reserved
2026-10-06
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 6.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-20Improper Input ValidationClass
  • CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
Data version
5.2
Document digest
3b4b5bb5312732add65e825df73e0b5324782d67ee616b7ca0908bd033ad0b56

05 Affected products

VendorProductVersionsPlatforms
backstagebackstage< 1.54.6—
@backstageplugin-proxy-backend< 0.6.17—

06 References