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01 Record

CVE-2026-106510

Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml

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: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml

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
0.47% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 41.0% of scored records. A rank, not a probability.
NVD base score
7.7 (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:L/A:L
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-13.
Red Hat severity
Important. 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
2026-10-07 14:36Z21 DAYS AGO
Last updated
2026-10-07 17:15Z21 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-183Permissive List of Allowed InputsBase
  • CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')Base
  • CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
Data version
5.2
Document digest
06d39ade966193ea8506a170a455f6b6031a574698a22b33925f628c718f00e9

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