CVE-2026-72759: CWE-862 Missing Authorization in misp cti-transmute
In affected versions of MISP cti-transmute, the conversion-history details endpoint performs an incomplete authorization check. When a history record references a deleted conversion, the associated conversion lookup returns None. The previous logic only denied access when the conversion object existed and the visibility check failed. As a result, deleted conversions bypassed the authorization check and their retained history input/output could be disclosed to a user able to request the corresponding history entry. The July 22, 2026 commit changes the logic to deny access whenever the conversion is missing or the requester lacks permission
AI Analysis
Technical Summary
CVE-2026-72759 is a missing authorization vulnerability (CWE-862) in MISP cti-transmute affecting versions up to 1.4.0. The conversion-history details endpoint performs an incomplete authorization check: when a history record references a deleted conversion, the conversion lookup returns None, and the previous logic only denied access if the conversion existed and visibility checks failed. This allowed unauthorized disclosure of retained history input/output data for deleted conversions. A commit dated July 22, 2026, changed the logic to deny access whenever the conversion is missing or the requester lacks permission, addressing the issue.
Potential Impact
Unauthorized users can access sensitive retained input/output data associated with deleted conversions in the conversion-history details endpoint. This could lead to information disclosure without requiring privileges or user interaction. The CVSS 4.0 score is 6.9 (medium severity), reflecting network attack vector, low complexity, no privileges or user interaction required, and low impact on confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The July 22, 2026 commit reportedly fixes the issue by denying access when the conversion is missing or the requester lacks permission. Users should verify application updates or patches from the vendor and apply them when available. Until then, restrict access to the conversion-history details endpoint to trusted users only.
CVE-2026-72759: CWE-862 Missing Authorization in misp cti-transmute
Description
In affected versions of MISP cti-transmute, the conversion-history details endpoint performs an incomplete authorization check. When a history record references a deleted conversion, the associated conversion lookup returns None. The previous logic only denied access when the conversion object existed and the visibility check failed. As a result, deleted conversions bypassed the authorization check and their retained history input/output could be disclosed to a user able to request the corresponding history entry. The July 22, 2026 commit changes the logic to deny access whenever the conversion is missing or the requester lacks permission
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72759 is a missing authorization vulnerability (CWE-862) in MISP cti-transmute affecting versions up to 1.4.0. The conversion-history details endpoint performs an incomplete authorization check: when a history record references a deleted conversion, the conversion lookup returns None, and the previous logic only denied access if the conversion existed and visibility checks failed. This allowed unauthorized disclosure of retained history input/output data for deleted conversions. A commit dated July 22, 2026, changed the logic to deny access whenever the conversion is missing or the requester lacks permission, addressing the issue.
Potential Impact
Unauthorized users can access sensitive retained input/output data associated with deleted conversions in the conversion-history details endpoint. This could lead to information disclosure without requiring privileges or user interaction. The CVSS 4.0 score is 6.9 (medium severity), reflecting network attack vector, low complexity, no privileges or user interaction required, and low impact on confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The July 22, 2026 commit reportedly fixes the issue by denying access when the conversion is missing or the requester lacks permission. Users should verify application updates or patches from the vendor and apply them when available. Until then, restrict access to the conversion-history details endpoint to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CIRCL
- Date Reserved
- 2026-08-10T14:18:43.725Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a79e343bf8831d539db1503
Added to database: 08/10/2026, 14:42:11 UTC
Last enriched: 08/10/2026, 16:32:37 UTC
Last updated: 08/10/2026, 17:44:58 UTC
Views: 4
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