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4 vulnerabilities found for backstage\/backend_defaults by linuxfoundation
CVE-2026-106494 (GCVE-0-2026-106494)
Vulnerability from nvd – Published: 2026-10-06 20:54 – Updated: 2026-10-07 15:32
VLAI
EPSS
VEX
Title
Backstage: Improper input validation in cloud storage URL readers
Summary
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:31 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/14e… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | backend-defaults |
Affected:
< 0.17.8
|
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CVE-2026-24048 (GCVE-0-2026-24048)
Vulnerability from nvd – Published: 2026-01-21 22:51 – Updated: 2026-01-22 16:48
VLAI
EPSS
VEX
Title
Backstage has a Possible SSRF when reading from allowed URL's in `backend.reading.allow`
Summary
Backstage is an open framework for building developer portals, and @backstage/backend-defaults provides the default implementations and setup for a standard Backstage backend app. Prior to versions 0.12.2, 0.13.2, 0.14.1, and 0.15.0, the `FetchUrlReader` component, used by the catalog and other plugins to fetch content from URLs, followed HTTP redirects automatically. This allowed an attacker who controls a host listed in `backend.reading.allow` to redirect requests to internal or sensitive URLs that are not on the allowlist, bypassing the URL allowlist security control. This is a Server-Side Request Forgery (SSRF) vulnerability that could allow access to internal resources, but it does not allow attackers to include additional request headers. This vulnerability is fixed in `@backstage/backend-defaults` version 0.12.2, 0.13.2, 0.14.1, and 0.15.0. Users should upgrade to this version or later. Some workarounds are available. Restrict `backend.reading.allow` to only trusted hosts that you control and that do not issue redirects, ensure allowed hosts do not have open redirect vulnerabilities, and/or use network-level controls to block access from Backstage to sensitive internal endpoints.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 15:09 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/27f… | x_refsource_MISC |
Impacted products
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CVE-2026-106494 (GCVE-0-2026-106494)
Vulnerability from cvelistv5 – Published: 2026-10-06 20:54 – Updated: 2026-10-07 15:32
VLAI
EPSS
VEX
Title
Backstage: Improper input validation in cloud storage URL readers
Summary
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 15:31 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/14e… | x_refsource_MISC |
| https://github.com/backstage/backstage/releases/t… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| backstage | backstage |
Affected:
< 1.54.6
|
|
| @backstage | backend-defaults |
Affected:
< 0.17.8
|
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CVE-2026-24048 (GCVE-0-2026-24048)
Vulnerability from cvelistv5 – Published: 2026-01-21 22:51 – Updated: 2026-01-22 16:48
VLAI
EPSS
VEX
Title
Backstage has a Possible SSRF when reading from allowed URL's in `backend.reading.allow`
Summary
Backstage is an open framework for building developer portals, and @backstage/backend-defaults provides the default implementations and setup for a standard Backstage backend app. Prior to versions 0.12.2, 0.13.2, 0.14.1, and 0.15.0, the `FetchUrlReader` component, used by the catalog and other plugins to fetch content from URLs, followed HTTP redirects automatically. This allowed an attacker who controls a host listed in `backend.reading.allow` to redirect requests to internal or sensitive URLs that are not on the allowlist, bypassing the URL allowlist security control. This is a Server-Side Request Forgery (SSRF) vulnerability that could allow access to internal resources, but it does not allow attackers to include additional request headers. This vulnerability is fixed in `@backstage/backend-defaults` version 0.12.2, 0.13.2, 0.14.1, and 0.15.0. Users should upgrade to this version or later. Some workarounds are available. Restrict `backend.reading.allow` to only trusted hosts that you control and that do not issue redirects, ensure allowed hosts do not have open redirect vulnerabilities, and/or use network-level controls to block access from Backstage to sensitive internal endpoints.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 15:09 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/backstage/backstage/security/a… | x_refsource_CONFIRM |
| https://github.com/backstage/backstage/commit/27f… | x_refsource_MISC |
Impacted products
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-24048",
"datePublished": "2026-01-21T22:51:44.015Z",
"dateReserved": "2026-01-20T22:30:11.778Z",
"dateUpdated": "2026-01-22T16:48:55.954Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}