ZeroDay Findings
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-88064

Backstage is an open framework for building developer portals.

Published Sep 16, 2026 · catalog updated Oct 14, 2026 · backstage plugin-techdocs-node

Check if you run it

No confirmed exploitation is on record for CVE-2026-88064. EPSS is 1.18%. Act only if a listed version of backstage plugin-techdocs-node is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.18%
Remediation
Advisory link
Affected products
cpe linuxfoundation/backstage · cpe linuxfoundation/backstage plugin-techdocs-node

Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the documentation generator and cause unintended code execution. The resulting impact is limited to the files, credentials, network access, and other resources available to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe linuxfoundation/backstageversion unspecified
  • cpe linuxfoundation/backstage plugin-techdocs-nodeversion unspecified

How to fix CVE-2026-88064

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-88064. EPSS is 1.18%. Act only if a listed version of backstage plugin-techdocs-node is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine; CWE-20: Improper Input Validation. EPSS 1.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 16, 2026 · NIST NVD

    Detected

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the docum

  2. Oct 14, 2026 · NIST NVD

    Updated

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the docum

Sources

  • CVE.orgVulnerability recordCVE-2026-88064

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-88064

    30-day exploitation probability 1.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-88064

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Pyth

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.