{"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’s 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($user, parent_id)</code>. If the parent is not an Event, access is limited to site administrators.</p>Version affected: ≤2.5.45<br>"}],"value":"Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().\n\n\nThe vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:\n\n\n\n  *  \ntype\n\n\n  *  \nkey_data\n\n\n  *  \nfingerprint\n\n\n\n\n\nbut did not fetch or authorize the associated parent event first.\n\n\nThe upstream commit explicitly states that cryptographicKeys/view could return a protected event’s signing key to any authenticated user.\n\n\nThe fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.\n\nVersion affected: ≤2.5.45"}],"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"}}]}}