CVE-2026-86408

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86408", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-07T12:11:12.888Z", "datePublished": "2026-09-07T12:11:18.233Z", "dateUpdated": "2026-09-08T14:49:54.747Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "MISP", "programFiles": ["app/Controller/CryptographicKeysController.php"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThanOrEqual": "2.5.45", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Scottish Government - National Cyber Team"}, {"lang": "en", "type": "remediation developer", "value": "iglocska"}, {"lang": "en", "type": "remediation developer", "value": "Claude Opus 5 (1M context)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through <code>CryptographicKeysController::view()</code>.</p>\n<p>The vulnerable handler queried <code>CryptographicKey</code> directly using the supplied key ID and selected sensitive fields such as:</p>\n<ul>\n<li>\n<code>type</code>\n</li>\n<li>\n<code>key_data</code>\n</li>\n<li>\n<code>fingerprint</code>\n</li>\n</ul>\n<p>but did not fetch or authorize the associated parent event first.</p>\n<p>The upstream commit explicitly states that <code>cryptographicKeys/view</code> could return a <strong>protected event\u2019s signing key to any authenticated user</strong>.</p>\n<p>The fix adds <code>parent_id</code> and <code>parent_type</code> to the lookup and then enforces authorization through the associated event using <code>fetchSimpleEvent($user, parent_id)</code>. If the parent is not an Event, access is limited to site administrators.</p>Version affected: \u22642.5.45<br>"}], "value": "Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().\n\n\nThe vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:\n\n\n\n * \ntype\n\n\n * \nkey_data\n\n\n * \nfingerprint\n\n\n\n\n\nbut did not fetch or authorize the associated parent event first.\n\n\nThe upstream commit explicitly states that cryptographicKeys/view could return a protected event\u2019s signing key to any authenticated user.\n\n\nThe fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.\n\nVersion affected: \u22642.5.45"}], "impacts": [{"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 7.1, "baseSeverity": "HIGH", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "description": "CWE-862 Missing Authorization", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-639", "description": "CWE-639 Authorization Bypass Through User-Controlled Key", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-09-07T12:11:18.233Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/MISP/MISP/commit/2edde619b"}], "source": {"discovery": "UNKNOWN"}, "title": "MISP Missing Authorization in Cryptographic Key View Exposes Signing Keys from Protected Events", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T14:49:41.763889Z", "id": "CVE-2026-86408", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T14:49:54.747Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"title": "MISP Missing Authorization in Cryptographic Key View Exposes Signing Keys from Protected Events", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Scottish Government - National Cyber Team"}, {"lang": "en", "type": "remediation developer", "value": "iglocska"}, {"lang": "en", "type": "remediation developer", "value": "Claude Opus 5 (1M context)"}], "impacts": [{"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "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": "2.5.45"}], "programFiles": ["app/Controller/CryptographicKeysController.php"], "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/MISP/MISP/commit/2edde619b", "tags": ["patch"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().\n\n\nThe vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:\n\n\n\n * \ntype\n\n\n * \nkey_data\n\n\n * \nfingerprint\n\n\n\n\n\nbut did not fetch or authorize the associated parent event first.\n\n\nThe upstream commit explicitly states that cryptographicKeys/view could return a protected event\u2019s signing key to any authenticated user.\n\n\nThe fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.\n\nVersion affected: \u22642.5.45", "supportingMedia": [{"type": "text/html", "value": "<p>Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through <code>CryptographicKeysController::view()</code>.</p>\n<p>The vulnerable handler queried <code>CryptographicKey</code> directly using the supplied key ID and selected sensitive fields such as:</p>\n<ul>\n<li>\n<code>type</code>\n</li>\n<li>\n<code>key_data</code>\n</li>\n<li>\n<code>fingerprint</code>\n</li>\n</ul>\n<p>but did not fetch or authorize the associated parent event first.</p>\n<p>The upstream commit explicitly states that <code>cryptographicKeys/view</code> could return a <strong>protected event\u2019s signing key to any authenticated user</strong>.</p>\n<p>The fix adds <code>parent_id</code> and <code>parent_type</code> to the lookup and then enforces authorization through the associated event using <code>fetchSimpleEvent($user, parent_id)</code>. If the parent is not an Event, access is limited to site administrators.</p>Version affected: \u22642.5.45<br>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-862", "description": "CWE-862 Missing Authorization"}]}, {"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": "2026-09-07T12:11:18.233Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-86408", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-08T14:49:41.763889Z"}}}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-09-08T14:49:48.952Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-86408", "state": "PUBLISHED", "dateUpdated": "2026-09-07T12:11:18.233Z", "dateReserved": "2026-09-07T12:11:12.888Z", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "datePublished": "2026-09-07T12:11:18.233Z", "assignerShortName": "CIRCL"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MISP", "programFiles": ["app/Controller/CryptographicKeysController.php"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThanOrEqual": "2.5.45", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:*", "matchCriteriaId": "92BCFD36-804A-4278-B718-69DC45796F21", "versionEndIncluding": "2.5.45", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().\n\n\nThe vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:\n\n\n\n * \ntype\n\n\n * \nkey_data\n\n\n * \nfingerprint\n\n\n\n\n\nbut did not fetch or authorize the associated parent event first.\n\n\nThe upstream commit explicitly states that cryptographicKeys/view could return a protected event\u2019s signing key to any authenticated user.\n\n\nThe fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.\n\nVersion affected: \u22642.5.45"}], "id": "CVE-2026-86408", "lastModified": "2026-09-09T15:26:17.753", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86408", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T14:49:41.763889Z", "version": "2.0.3"}}]}, "published": "2026-09-07T13:20:40.100", "references": [{"source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "tags": ["Patch"], "url": "https://github.com/MISP/MISP/commit/2edde619b"}], "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}, {"lang": "en", "value": "CWE-862"}], "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.5.45]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "MISP", "source": "cna", "vendor": "MISP"}, "product": "misp", "vendor": "misp"}], "created": "2026-09-07T14:45:16.926992+00:00", "updated": "2026-09-07T14:45:17.061029+00:00", "vendors": ["misp", "misp$PRODUCT$misp"]}