CVE-2026-106458 json
Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates
published 2026-10-06 33 d ago modified 2026-10-27 12 d ago also GHSA-c36c-cf6r-ghgj , EUVD-2026-93992
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
Backstage is an open framework for building developer portals. From 0.4.0 until 0.5.15, the @backstage/plugin-catalog-backend-module-bitbucket-server package is affected by inconsistent repository filtering in bitbucket server catalog event updates. Deployments using event-driven updates in the Bitbucket Server catalog provider may ingest catalog locations from repositories that are excluded by the provider's configured project, repository, or archived-repository filters. An authenticated Bitbucket Server user who can push to a filtered-out repository that remains readable by the configured Backstage integration can trigger a legitimate repository event. The affected event path may then add a Location for that repository even though scheduled discovery excludes it. This issue is fixed in version 0.5.15.
Patch / fix
- npm @backstage/plugin-catalog-backend-module-bitbucket-server 0.5.15
- linuxfoundation backstage/plugin-catalog-backend-module-bitbucket-server 0.5.15
- linuxfoundation backstage 1.55.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 33 d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @backstage/plugin-catalog-backend-module-bitbucket-server | >=0.4.0, <0.5.15 |
0.5.15 |
Affected products
- backstage backstage
- @backstage plugin-catalog-backend-module-bitbucket-server
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/backstage/backstage/commit/989db63b6f87c8fc04d440f296ad89e10c79b363
web, patch
-
github.com
/backstage/backstage/releases/tag/v1.55.0
web, patch, release-notes
-
github.com
/backstage/backstage/security/advisories/GHSA-c36c-cf6r-ghgj
web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-106458
advisory
-
github.com
/backstage/backstage
package
Sources
- CVE List CVE-2026-106458
- GitHub Advisory GHSA-c36c-cf6r-ghgj
- NVD CVE-2026-106458
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