CVE-2026-107175 (GCVE-0-2026-107175)
Vulnerability from cvelistv5
Published
2026-10-07 12:38
Modified
2026-10-07 14:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
MISP contains a defect in its event save workflow that prevents the correlation engine from recalculating correlations when an event's distribution level or sharing group is modified.
When a user edits an existing event and changes its distribution or sharing_group_id, the internal before-save hook stored the incoming (new) data rather than the previously persisted values. As a result, the after-save comparison that determines whether a correlation refresh is needed never detected the change, and stale correlations persisted.
Security impact:
- Stale correlations may continue to expose event data to users in a broader sharing group after the event has been moved to a more restrictive group, resulting in unintended information disclosure.
- Conversely, newly relevant correlations may not appear after a distribution widening, degrading the completeness of threat intelligence sharing.
Preconditions:
- An authenticated user with write access to at least one MISP event.
- The user modifies the event's distribution or sharing_group_id field.
Affected versions: <2.5.48
References
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This allows the after-save logic to correctly detect when these fields have changed and trigger a correlation refresh, ensuring access boundaries on correlated data are enforced promptly.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe fix ensures that the before-save hook retrieves the previously persisted distribution and sharing_group_id values from the database for existing events, rather than capturing the incoming (new) data. This allows the after-save logic to correctly detect when these fields have changed and trigger a correlation refresh, ensuring access boundaries on correlated data are enforced promptly.\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://github.com/MISP/MISP/commit/19a389d19\", \"name\": \"Security patch\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"MISP contains a defect in its event save workflow that prevents the correlation engine from recalculating correlations when an event\u0027s distribution level or sharing group is modified.\\n\\nWhen a user edits an existing event and changes its distribution or sharing_group_id, the internal before-save hook stored the incoming (new) data rather than the previously persisted values. As a result, the after-save comparison that determines whether a correlation refresh is needed never detected the change, and stale correlations persisted.\\n\\nSecurity impact:\\n\\n- Stale correlations may continue to expose event data to users in a broader sharing group after the event has been moved to a more restrictive group, resulting in unintended information disclosure.\\n\\n- Conversely, newly relevant correlations may not appear after a distribution widening, degrading the completeness of threat intelligence sharing.\\n\\nPreconditions:\\n\\n- An authenticated user with write access to at least one MISP event.\\n\\n- The user modifies the event\u0027s distribution or sharing_group_id field.\\n\\nAffected versions: \u003c2.5.48\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eMISP contains a defect in its event save workflow that prevents the correlation engine from recalculating correlations when an event\u0027s distribution level or sharing group is modified.\u003c/p\u003e\u003cp\u003eWhen a user edits an existing event and changes its distribution or sharing_group_id, the internal before-save hook stored the incoming (new) data rather than the previously persisted values. As a result, the after-save comparison that determines whether a correlation refresh is needed never detected the change, and stale correlations persisted.\u003c/p\u003e\u003cp\u003eSecurity impact:\u003c/p\u003e\u003cp\u003e- Stale correlations may continue to expose event data to users in a broader sharing group after the event has been moved to a more restrictive group, resulting in unintended information disclosure.\u003c/p\u003e\u003cp\u003e- Conversely, newly relevant correlations may not appear after a distribution widening, degrading the completeness of threat intelligence sharing.\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- An authenticated user with write access to at least one MISP event.\u003c/p\u003e\u003cp\u003e- The user modifies the event\u0027s distribution or sharing_group_id field.\u003c/p\u003e\u003cp\u003eAffected versions: \u0026lt;2.5.48\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-284\", \"description\": \"CWE-284 Improper Access Control\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-665\", \"description\": \"CWE-665 Improper Initialization\"}]}], \"providerMetadata\": {\"orgId\": \"5a6e4751-2f3f-4070-9419-94fb35b644e8\", \"shortName\": \"CIRCL\", \"dateUpdated\": \"2026-10-07T12:38:44.252Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-107175\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-07T14:40:14.998Z\", \"dateReserved\": \"2026-10-07T12:38:41.839Z\", \"assignerOrgId\": \"5a6e4751-2f3f-4070-9419-94fb35b644e8\", \"datePublished\": \"2026-10-07T12:38:44.252Z\", \"assignerShortName\": \"CIRCL\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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