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01 Record

CVE-2026-106505

Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend

HighPUBLISHEDCNA: GitHub_M
CNA base score7.7 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
View raw JSON

02 Description

Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend

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
0.31% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 23.8% of scored records. A rank, not a probability.
NVD base score
8.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-09.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

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 21:43Z22 DAYS AGO
Last updated
2026-10-07 16:14Z22 DAYS AGO
Reserved
2026-10-06
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.7)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
Weaknesses
  • CWE-426Untrusted Search PathBase
  • CWE-436Interpretation ConflictClass
  • CWE-94Improper Control of Generation of Code ('Code Injection')Base
Data version
5.2
Document digest
5ccd034cc86383fe54bfc69bc76edb9afceb062d8ebb4d4e454b7d79228b1e55

05 Affected products

VendorProductVersionsPlatforms
backstagebackstage< 1.50.5, >= 1.51.0-next.0, < 1.54.6—
@backstageplugin-techdocs-node< 1.14.6, >= 1.15.0, < 1.15.4—

06 References