CVE-2026-106459CWE-200CWE-918information-disclosuressrf

CVE-2026-106459

High · published October 7, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
10.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00212 · 10.9th percentile
Weaknesses
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-10-07T01:17Z
Affected products (2)
ProductVersionsFixed in
linuxfoundation/backstage\/plugin-scaffolder-backend-module-sentry≥ 0.3.0, < 0.3.80.3.8
linuxfoundation/backstage≥ 1.47.0, < 1.54.81.54.8
References (4)
https://github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.8 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.55.0 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfp · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 20:19Z
    Backstage: Improper input validation in Sentry scaffolder actions
    cvelistv5