CVE-2026-106510: backstage — Fix

Description

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.

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CVSS v3.1 Score

7.7

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

EPSS — Exploit Prediction

0.0048

Probability of exploitation

0.41%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-183 CWE-183

CWE-470 CWE-470

Affected Products

Vendor	Product	Versions
linuxfoundation	backstage_plugin-techdocs-node	< 1.14.6
linuxfoundation	backstage_plugin-techdocs-node	1.15.0 — 1.15.4
linuxfoundation	backstage	< 1.50.5
linuxfoundation	backstage	1.51.1 — 1.54.6
linuxfoundation	backstage	All
linuxfoundation	backstage	All
linuxfoundation	backstage	All
linuxfoundation	backstage	All
linuxfoundation	backstage	All

References

Advisories & Patches

https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d https://github.com/backstage/backstage/releases/tag/v1.50.5 https://github.com/backstage/backstage/releases/tag/v1.54.6 https://github.com/backstage/backstage/security/advisories/GHSA-4488-j8vj-vqqv

Frequently Asked Questions

What is CVE-2026-106510? +

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. It has a CVSS v3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-106510? +

CVE-2026-106510 has a CVSS v3.1 score of 7.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0048, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-106510? +

CVE-2026-106510 affects products from linuxfoundation, specifically: backstage, backstage_plugin-techdocs-node. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-106510? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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