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CVE-2026-44374

Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks

MEDIUM
4.3
CVSS Score
Published: May 14, 2026 at 02:30 PM UTC
Updated: October 26, 2026 at 02:10 PM UTC
6 products affected across 2 vendorsBackstage /plugin Catalog Unprocessed EntitiesBackstage /plugin Catalog Unprocessed Entities CommonBackstage /plugin Catalog Backend Module Unprocessed

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Backstage is an open framework for building developer portals. Prior to 0.6.11, the unprocessed entities read endpoints in @backstage/plugin-catalog-backend-module-unprocessed do not enforce permission authorization checks. Any authenticated user can access unprocessed entity records regardless of ownership. This is an information disclosure vulnerability affecting Backstage installations using this module. This is patched in @backstage/plugin-catalog-backend-module-unprocessed version 0.6.11, @backstage/plugin-catalog-unprocessed-entities-common version 0.0.15 and @backstage/plugin-catalog-unprocessed-entities version 0.2.30.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Backstage /plugin Catalog Backend Module Unprocessed· Linuxfoundation
95%
v < 0.6.11
Affected range stops below 0.6.11, so it looks safe — our inference, not a vendor statement
Backstage /plugin Catalog Unprocessed Entities· Linuxfoundation
95%
v < 0.2.30
Affected range stops below 0.2.30, so it looks safe — our inference, not a vendor statement
Backstage /plugin Catalog Unprocessed Entities Common· Linuxfoundation
95%
v < 0.0.15
Affected range stops below 0.0.15, so it looks safe — our inference, not a vendor statement
Plugin Catalog Backend Module Unprocessed· Backstage
90%
v < 0.6.11
Affected range stops below 0.6.11, so it looks safe — our inference, not a vendor statement
Plugin Catalog Unprocessed Entities· Backstage
90%
v < 0.2.30
Affected range stops below 0.2.30, so it looks safe — our inference, not a vendor statement
Plugin Catalog Unprocessed Entities Common· Backstage
90%
v < 0.0.15
Affected range stops below 0.0.15, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/backstage/backstage/security/advisories/GHSA-p7g9-rp3g-mgfg

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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