synced 1 MIN AGO
01 Record

CVE-2026-106556

Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization

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: Configuration bypass in TechDocs mkdocs.yml sanitization

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
0.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 17.1% 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 14:39Z21 DAYS AGO
Last updated
2026-10-07 16:16Z21 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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
  • CWE-184Incomplete List of Disallowed InputsBase
Data version
5.2
Document digest
f6f473f4c2180dd01a45d0698b2180fadd518c034e7f0ac53a9793796c8cdb47

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