CVE-2026-106459Backstage: Improper input validation in Sentry scaffolder actions
Updated under an hour ago ()
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It affects backstage and 3 other products. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 11% of scored CVEs.
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Backstage is an open framework for building developer portals. From 0.3.0 until 0.3.8, the @backstage/plugin-scaffolder-backend-module-sentry package is affected by improper input validation in sentry scaffolder actions. An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token. This issue is fixed in version 0.3.8.
- CVSS
- 8.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-200, CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.21% (percentile 11)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backstage backstage backstage:backstage (from the name) | from 1.47.0, < 1.54.8 | CNA record |
@backstage plugin-scaffolder-backend-module-sentry backstage:plugin_scaffolder_backend_module_sentry (from the name) | from 0.3.0, < 0.3.8 | CNA record |
linuxfoundation backstage/plugin-scaffolder-backend-module-sentry linuxfoundation:backstage/plugin-scaffolder-backend-module-sentry | from 0.3.0 before 0.3.8 | NVD |
linuxfoundation backstage linuxfoundation:backstage | from 1.47.0 before 1.54.8 | NVD |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfpx-refsource-confirm, mitigation, vendor-advisory
- https://github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7x-refsource-misc, patch
- https://github.com/backstage/backstage/releases/tag/v1.54.8x-refsource-misc, patch, product
- https://github.com/backstage/backstage/releases/tag/v1.55.0x-refsource-misc, patch, product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.