EUVD-2026-87825
GHSA-v44j-74xg-9j2q
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Authenticated remote workflow author (AV:N/PR:L); AC:H because a passwordless loopback Redis must exist (non-default); read/write grants both C:H and I:H, no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
heym before 0.0.105 does not act on the result of the credential authorization lookup in the Redis workflow node (backend/app/services/node_execution/nodes/redis_node.py). When _get_accessible_credential returns None - because the credential ID does not exist or the caller is not authorized to use it - the node treats the lookup failure as an empty configuration and falls back to defaults, connecting to localhost:6379 with no password and executing the requested operation there. The same fallback occurs when an accessible credential has an empty config or no redis_host value. An authenticated workflow author who supplies a credential ID they do not own, or one that was deleted, therefore obtains a read/write connection to whatever Redis is listening on the backend's loopback interface instead of an error. Impact depends on the deployment: the stock docker-compose.yml ships no Redis, in which case the flaw surfaces as a misleading connection error rather than data exposure.
AnalysisAI
heym before 0.0.105 fails to enforce credential authorization in its Redis workflow node, letting an authenticated workflow author cause the node to fall back to unauthenticated defaults on the backend's loopback interface. When the credential lookup returns no accessible credential - because the ID does not exist, was deleted, or belongs to another user - the node treats the failure as empty configuration and connects to localhost:6379 with no password, executing the requested Redis operation there. …
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Vulnerability AssessmentAI
| Exploitation | Requires an authenticated account with workflow-authoring privileges in heym before 0.0.105, plus a passwordless Redis instance actually listening on the backend's loopback interface (localhost:6379). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine-but-narrow authorization flaw whose real-world severity is heavily gated by deployment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade heym to 0.0.105 or later, which is the version in which the credential-lookup result is acted upon rather than defaulted; consult the vendor advisory at https://github.com/heymrun/heym/security/advisories/GHSA-fmpw-hj3m-xvj6 for the authoritative fix guidance. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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