CVE-2026-56422 (GCVE-0-2026-56422)
Vulnerability from cvelistv5 – Published: 2026-06-22 11:43 – Updated: 2026-06-23 05:58
VLAI
EPSS
VEX
Title
MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields
Summary
Multiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (id) and ownership/scope foreign keys (event_id, org_id, user_id, sharing_group_id, galaxy_cluster_uuid, organisation_uuid, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.
In affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user’s context.
The fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central CRUDComponent::edit() primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub’s patch for 7acf8220c describes this central issue as CRUDComponent::edit() copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save() to update an arbitrary row unless the loaded ID is re-pinned.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 16:09 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
16 references
Impacted products
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"value": "\u003cp\u003eMultiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (\u003ccode\u003eid\u003c/code\u003e) and ownership/scope foreign keys (\u003ccode\u003eevent_id\u003c/code\u003e, \u003ccode\u003eorg_id\u003c/code\u003e, \u003ccode\u003euser_id\u003c/code\u003e, \u003ccode\u003esharing_group_id\u003c/code\u003e, \u003ccode\u003egalaxy_cluster_uuid\u003c/code\u003e, \u003ccode\u003eorganisation_uuid\u003c/code\u003e, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.\u003c/p\u003e\u003cp\u003eIn affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user\u2019s context.\u003c/p\u003e\u003cp\u003eThe fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central \u003ccode\u003eCRUDComponent::edit()\u003c/code\u003e\u0026nbsp;primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub\u2019s patch for \u003ccode\u003e7acf8220c\u003c/code\u003e\u0026nbsp;describes this central issue as \u003ccode\u003eCRUDComponent::edit()\u003c/code\u003e\u0026nbsp;copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP \u003ccode\u003esave()\u003c/code\u003e\u0026nbsp;to update an arbitrary row unless the loaded ID is re-pinned. \u003c/p\u003e\u003cbr\u003e"
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"value": "Multiple MISP core controllers and model capture paths accepted client-controlled request fields such as primary keys (id) and ownership/scope foreign keys (event_id, org_id, user_id, sharing_group_id, galaxy_cluster_uuid, organisation_uuid, and related nested object identifiers) without consistently stripping, pinning, or revalidating them against the server-authorized object.\n\nIn affected paths, an authenticated user with access to one authorized object could submit crafted REST or form payloads that caused MISP to save data against a different object than the one checked by the authorization logic. Depending on the endpoint, this could allow object overwrite, object re-parenting, ownership transfer, unauthorized sharing-group scoping, event/object injection, proposal retargeting, or stored attacker-controlled content appearing in another user\u2019s context.\n\nThe fixes harden affected create/edit/import flows by stripping client-supplied primary keys on create-only saves, re-pinning route- or database-authorized identifiers before save operations, validating effective sharing-group scope, and adding field whitelists where ownership fields must never be editable. The initial broad fix also added a central CRUDComponent::edit()\u00a0primary-key re-pin so payload-supplied IDs cannot redirect saves away from the already-authorized row. GitHub\u2019s patch for 7acf8220c\u00a0describes this central issue as CRUDComponent::edit()\u00a0copying supplied fields, including a payload primary key, onto the loaded record, allowing CakePHP save()\u00a0to update an arbitrary row unless the loaded ID is re-pinned."
}
],
"impacts": [
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"capecId": "CAPEC-115",
"descriptions": [
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"lang": "en",
"value": "CAPEC-115 Authentication Bypass"
}
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}
],
"metrics": [
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"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
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"providerUrgency": "NOT_DEFINED",
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"subConfidentialityImpact": "HIGH",
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"valueDensity": "NOT_DEFINED",
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"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
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"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"value": "GENERAL"
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-639",
"description": "CWE-639 Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
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"dateUpdated": "2026-06-23T05:58:54.059Z",
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"url": "https://github.com/MISP/MISP/commit/7acf8220cafac58bcfb362da37aca512fe4bb396"
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"source": {
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"title": "MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields",
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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