CVE-2026-106558High· 8.8▾ TwilightBackstage is an open framework for building developer portals. Prior to 1.14.8, 1.15.6, and 2.0.1, the @backstage/plugin-techdocs-node package improperly validated mapping-style markdown_extensions configuration. An authenticated attacke…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
Last analysed / modified upstream
Backstage is an open framework for building developer portals. Prior to 1.14.8, 1.15.6, and 2.0.1, the @backstage/plugin-techdocs-node package improperly validated mapping-style markdown_extensions configuration. An authenticated attacker who can register or influence an SCM-backed documentation source may bypass TechDocs sanitization and cause Python objects to be imported and instantiated in the generator runtime, leading to arbitrary code execution. Earlier fixes in versions 1.14.6 and 1.15.4 did not fully address the supported mapping representation of markdown_extensions. Impact is greatest when documentation generation runs with backend credentials, filesystem access, or internal network access. This issue is fixed in versions 1.14.8, 1.15.6, and 2.0.1.
backstage_plugin-techdocs-node < 1.14.8backstage_plugin-techdocs-node >= 1.15.0, < 1.15.6backstage_plugin-techdocs-node >= 2.0.0, < 2.0.1backstage < 1.50.7backstage >= 1.51.1, < 1.54.8backstage >= 1.55.1, < 1.55.2backstage = 1.51.0backstage = 1.55.0Upgrade past the affected range:
backstage_plugin-techdocs-node 2.0.1backstage 1.55.2Affected packages:
@backstage/plugin-techdocs-node < 1.15.4Patched in:
@backstage/plugin-techdocs-node 1.15.4Source: https://github.com/advisories/GHSA-qmw3-745m-w99g
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-106509High· 7.7Backstage is an open framework for building developer portals
CVE-2026-106505High· 7.7Backstage is an open framework for building developer portals
CVE-2026-106455High· 7.7Backstage is an open framework for building developer portals
CVE-2026-106510High· 7.7Backstage is an open framework for building developer portals
CVE-2026-106506Medium· 5.3Backstage is an open framework for building developer portals
CVE-2026-106503High· 8.1Backstage is an open framework for building developer portals