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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"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-56422\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-22T16:09:12.774625Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-22T16:09:14.812Z\"}}], \"cna\": {\"title\": \"MISP Core: Mass Assignment and Object Re-ownership via Unvalidated Request Fields\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Andras Iklody\"}, {\"lang\": \"en\", \"type\": \"analyst\", \"value\": \"Jeroen Pinoy\"}, {\"lang\": \"en\", \"type\": \"tool\", \"value\": \"Claude (the international export version)\"}, {\"lang\": \"en\", \"type\": \"analyst\", \"value\": \"Jakub Chyli\\u0144ski\"}], \"impacts\": [{\"capecId\": \"CAPEC-115\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-115 Authentication Bypass\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 9.4, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"HIGH\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/misp/misp\", \"vendor\": \"misp\", \"product\": \"misp\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.5.41\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/MISP/MISP/commit/7acf8220cafac58bcfb362da37aca512fe4bb396\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/bc182d55dde5686a36ca2eb88fe6c2adabb9fad9\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/58f637aaab4d133e72f1454ebb963191d96d3b78\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/05aad418c57bb78e6b58a843d70d45de8f50db45\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/63aebc27a878233b9475c742985aaef909bc755b\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/00b2e3dae56fa24ea750eb525cc4709b7e5bee85\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/634f1f87c295193486c08c2c7ba1fee8a7339baa\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/ab9619dfa6cb5210fd20fb3b0b57006e4fc93916\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/8311427c2edd72a8341f0a65e1f11073d7ad9191\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/c80a3533b3d787f45f5185a4621cc0f05b0cf2e5\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/025f711506850aadb69cde1b57e5e5d57628c87f\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/3ff6bd9cfdab5d41b4667ea7298d88ffd6f3fcb8\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/84bafe69f5d0ab7f811371c0801a613f271ebc0b\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/2cc26f38f3e85c594957899f09043d5193146607\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/57433015815e59db5a1f11536f90920952cf3fcd\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/MISP/MISP/commit/9341690e9b6dde7f0605edea5533e05ba7362e35\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"CWE-639 Authorization Bypass Through User-Controlled Key\"}]}], \"providerMetadata\": {\"orgId\": \"5a6e4751-2f3f-4070-9419-94fb35b644e8\", \"shortName\": \"CIRCL\", \"dateUpdated\": \"2026-06-23T05:58:54.059Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-56422\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-23T05:58:54.059Z\", \"dateReserved\": \"2026-06-22T11:42:55.345Z\", \"assignerOrgId\": \"5a6e4751-2f3f-4070-9419-94fb35b644e8\", \"datePublished\": \"2026-06-22T11:43:02.690Z\", \"assignerShortName\": \"CIRCL\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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