CVE-2026-106510
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
- Record
CVE-2026-106510- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Weakness
- CWE-183, CWE-470
- Updated
- 2026-11-02
EUVDEUVD-2026-94369
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
- Record
EUVD-2026-94369- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4488-j8vj-vqqv
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Impact
An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built.
Patches
Patched in @backstage/plugin-techdocs-node, version 1.15.4.
Workarounds
If you cannot upgrade immediately:
- Switch to
techdocs.builder: externalto isolate TechDocs builds in a container. - Restrict who can register catalog entities with TechDocs annotations.
- Audit existing catalog entities for suspicious
markdown_extensionsvalues in theirmkdocs.ymlfiles.
- Record
GHSA-4488-j8vj-vqqv- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Weakness
- CWE-183, CWE-470
- Updated
- 2026-11-02
NVD
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
- Record
CVE-2026-106510- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Weakness
- CWE-183, CWE-470
- Updated
- 2026-11-02
OSV
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. This issue is fixed in versions 1.14.6 and 1.15.4.
- Record
CVE-2026-106510- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Weakness
- CWE-183, CWE-470
- Updated
- 2026-11-02
OSVGHSA-4488-j8vj-vqqv
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Impact
An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built.
Patches
Patched in @backstage/plugin-techdocs-node, version 1.15.4.
Workarounds
If you cannot upgrade immediately:
- Switch to
techdocs.builder: externalto isolate TechDocs builds in a container. - Restrict who can register catalog entities with TechDocs annotations.
- Audit existing catalog entities for suspicious
markdown_extensionsvalues in theirmkdocs.ymlfiles.
- Record
GHSA-4488-j8vj-vqqv- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L - Weakness
- CWE-183, CWE-470
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@backstage/plugin-techdocs-nodenpm |
before 1.15.4 | 1.15.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-106510 is a high vulnerability (CVSS 7.7) in @backstage Plugin-techdocs-node, published October 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 41st percentile. Fixed in @backstage/plugin-techdocs-node 1.15.4.
References
github.com/backstage/backstage/security/advisories/GHSA-4488-j8vj-vqqv
nvd.nist.gov/vuln/detail/CVE-2026-106510