{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91857", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-15T09:14:39.778Z", "datePublished": "2026-09-15T09:14:43.722Z", "dateUpdated": "2026-09-15T13:19:25.134Z"}, "containers": {"cna": {"affected": [{"modules": ["EventReportsController", "NoticelistsController", "ServersController", "WorkflowsController"], "product": "MISP", "programFiles": ["app/Controller/EventReportsController.php", "app/Controller/NoticelistsController.php", "app/Controller/ServersController.php", "app/Controller/WorkflowsController.php", "app/View/EventReports/managed_imported_pictures.ctp"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThan": "2.5.46", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"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></p><p>Affected versions of MISP expose several state-changing controller actions without restricting them to POST.</p>\n<p>The affected actions are:</p><p></p><code>\u2003-&nbsp;EventReportsController::purgeUnusedPictures()</code>\n<br><code>\u2003-&nbsp;NoticelistsController::enableNoticelist()</code>\n<br><code>\u2003-&nbsp;ServersController::removeOrphanedCorrelations()</code>\n<br><div><code>\u2003- WorkflowsController::rebuildRedis()</code></div><div><code><br></code></div><p><code></code></p><p>The patch adds <code>allowMethod(['post'])</code> to each action, preventing them from being triggered through ordinary GET requests.</p>\n<p>For <code>purgeUnusedPictures()</code>, the corresponding UI previously used <code>$.get()</code>. The fix converts that request to POST and supplies <code>X-CSRF-Token</code>, while the controller enables header-only CSRF validation for that AJAX action.</p>\n<p>Because GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.</p><p>Version affected: \u22642.5.45<br></p><p></p>"}], "value": "Affected versions of MISP expose several state-changing controller actions without restricting them to POST.\n\n\nThe affected actions are:\n\n\n\n\u2003-\u00a0EventReportsController::purgeUnusedPictures()\n\n\u2003-\u00a0NoticelistsController::enableNoticelist()\n\n\u2003-\u00a0ServersController::removeOrphanedCorrelations()\n\n\u2003- WorkflowsController::rebuildRedis()\n\n\n\n\n\n\nThe patch adds allowMethod(['post']) to each action, preventing them from being triggered through ordinary GET requests.\n\n\nFor purgeUnusedPictures(), the corresponding UI previously used $.get(). The fix converts that request to POST and supplies X-CSRF-Token, while the controller enables header-only CSRF validation for that AJAX action.\n\n\nBecause GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.\n\nVersion affected: \u22642.5.45"}], "impacts": [{"capecId": "CAPEC-62", "descriptions": [{"lang": "en", "value": "CAPEC-62 Cross Site Request Forgery"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.3, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-352", "description": "CWE-352 Cross-Site Request Forgery (CSRF)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-09-15T09:14:43.722Z"}, "references": [{"name": "Security patch", "tags": ["patch"], "url": "https://github.com/MISP/MISP/commit/b4a5486b5"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The vulnerability is remediated by restricting all four state-changing actions to accept only POST requests via the CakePHP allowMethod() guard. Additionally, the client-side JavaScript for purgeUnusedPictures is updated to issue a POST request with the page's CSRF token in the X-CSRF-Token header, and a beforeFilter() hook is added to EventReportsController to configure header-only CSRF token validation for that specific action, since it is invoked via hand-built AJAX rather than a rendered form.</p>"}], "value": "The vulnerability is remediated by restricting all four state-changing actions to accept only POST requests via the CakePHP allowMethod() guard. Additionally, the client-side JavaScript for purgeUnusedPictures is updated to issue a POST request with the page's CSRF token in the X-CSRF-Token header, and a beforeFilter() hook is added to EventReportsController to configure header-only CSRF token validation for that specific action, since it is invoked via hand-built AJAX rather than a rendered form."}], "title": "MISP: State-changing actions accessible via GET request enabling CSRF", "x_gcve": [{"extensions": {"bcp-05-x-01": {"ai_annotations": [{"ai_level": "generated", "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. 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AC:L: No special race conditions or complex setup are required; a simple GET URL suffices. AT:N: No prior compromise or manipulation of the target system is needed. PR:L: The attacker requires the victim to be an authenticated MISP user; the attacker themselves need not be authenticated. UI:A: The victim must actively interact (click a link or navigate to a crafted page) to trigger the forged request. VC:N: No confidential data is exposed by the affected actions. VI:L: Integrity impact is low; the actions cause limited state changes (deleting unused pictures, toggling a noticelist, removing orphaned correlations, rebuilding a cache) rather than corrupting critical data. VA:N: No meaningful availability impact; the actions do not cause denial of service. SC/SI/SA:N: No impact on subsequent systems.", "draft": false, "fixSummary": "The vulnerability is remediated by restricting all four state-changing actions to accept only POST requests via the CakePHP allowMethod() guard. Additionally, the client-side JavaScript for purgeUnusedPictures is updated to issue a POST request with the page's CSRF token in the X-CSRF-Token header, and a beforeFilter() hook is added to EventReportsController to configure header-only CSRF token validation for that specific action, since it is invoked via hand-built AJAX rather than a rendered form.", "generatedAt": "2026-09-15T09:10:36.581856Z", "generator": "patch2vuln.py", "model": "qwen3.8:27b", "modelComparison": {"rankings": [{"agreementScore": 9, "assumptionCount": 4, "confidence": "high", "model": "qwen3.8:27b", "score": 7}], "selectedModel": "qwen3.8:27b", "selectionMethod": "deterministic-consensus-v1", "selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."}, "patchSha256": "adc31514b96a99a411ca1ed5a31abf99642d19de3a09f536e62310b298d2552b", "patchSummary": "Adds $this->request->allowMethod(['post']) to purgeUnusedPictures, enableNoticelist, removeOrphanedCorrelations, and rebuildRedis. 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{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-91857", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-15T13:10:25.729586Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T13:15:10.819Z"}}], "cna": {"title": "MISP: State-changing actions accessible via GET request enabling CSRF", "x_gcve": [{"vulnId": "GCVE-1-2026-20242", "extensions": {"bcp-05-x-01": {"ai_annotations": [{"tags": ["ai-computer-assisted:llm-generated", "ai-computer-assisted:classification"], "scope": "record", "models": [{"name": "qwen3.8:27b", "source": "ollama", "gna_source": 1, "identifier": "qwen3.8:27b"}], "ai_level": "generated", "gna_source": 1, "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. 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Additionally, the client-side JavaScript for purgeUnusedPictures is updated to issue a POST request with the page's CSRF token in the X-CSRF-Token header, and a beforeFilter() hook is added to EventReportsController to configure header-only CSRF token validation for that specific action, since it is invoked via hand-built AJAX rather than a rendered form.", "supportingMedia": [{"type": "text/html", "value": "<p>The vulnerability is remediated by restricting all four state-changing actions to accept only POST requests via the CakePHP allowMethod() guard. Additionally, the client-side JavaScript for purgeUnusedPictures is updated to issue a POST request with the page's CSRF token in the X-CSRF-Token header, and a beforeFilter() hook is added to EventReportsController to configure header-only CSRF token validation for that specific action, since it is invoked via hand-built AJAX rather than a rendered form.</p>", "base64": false}]}], "references": [{"url": "https://github.com/MISP/MISP/commit/b4a5486b5", "name": "Security patch", "tags": ["patch"]}], "descriptions": [{"lang": "en", "value": "Affected versions of MISP expose several state-changing controller actions without restricting them to POST.\n\n\nThe affected actions are:\n\n\n\n\u2003-\u00a0EventReportsController::purgeUnusedPictures()\n\n\u2003-\u00a0NoticelistsController::enableNoticelist()\n\n\u2003-\u00a0ServersController::removeOrphanedCorrelations()\n\n\u2003- WorkflowsController::rebuildRedis()\n\n\n\n\n\n\nThe patch adds allowMethod(['post']) to each action, preventing them from being triggered through ordinary GET requests.\n\n\nFor purgeUnusedPictures(), the corresponding UI previously used $.get(). The fix converts that request to POST and supplies X-CSRF-Token, while the controller enables header-only CSRF validation for that AJAX action.\n\n\nBecause GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.\n\nVersion affected: \u22642.5.45", "supportingMedia": [{"type": "text/html", "value": "<p></p><p>Affected versions of MISP expose several state-changing controller actions without restricting them to POST.</p>\n<p>The affected actions are:</p><p></p><code>\u2003-&nbsp;EventReportsController::purgeUnusedPictures()</code>\n<br><code>\u2003-&nbsp;NoticelistsController::enableNoticelist()</code>\n<br><code>\u2003-&nbsp;ServersController::removeOrphanedCorrelations()</code>\n<br><div><code>\u2003- WorkflowsController::rebuildRedis()</code></div><div><code><br></code></div><p><code></code></p><p>The patch adds <code>allowMethod(['post'])</code> to each action, preventing them from being triggered through ordinary GET requests.</p>\n<p>For <code>purgeUnusedPictures()</code>, the corresponding UI previously used <code>$.get()</code>. The fix converts that request to POST and supplies <code>X-CSRF-Token</code>, while the controller enables header-only CSRF validation for that AJAX action.</p>\n<p>Because GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.</p><p>Version affected: \u22642.5.45<br></p><p></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-352", "description": "CWE-352 Cross-Site Request Forgery (CSRF)"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-09-15T09:14:43.722Z"}}}, "cveMetadata": {"cveId": "CVE-2026-91857", "state": "PUBLISHED", "dateUpdated": "2026-09-15T13:19:25.134Z", "dateReserved": "2026-09-15T09:14:39.778Z", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "datePublished": "2026-09-15T09:14:43.722Z", "assignerShortName": "CIRCL"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"modules": ["EventReportsController", "NoticelistsController", "ServersController", "WorkflowsController"], "product": "MISP", "programFiles": ["app/Controller/EventReportsController.php", "app/Controller/NoticelistsController.php", "app/Controller/ServersController.php", "app/Controller/WorkflowsController.php", "app/View/EventReports/managed_imported_pictures.ctp"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThan": "2.5.46", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Affected versions of MISP expose several state-changing controller actions without restricting them to POST.\n\n\nThe affected actions are:\n\n\n\n\u2003-\u00a0EventReportsController::purgeUnusedPictures()\n\n\u2003-\u00a0NoticelistsController::enableNoticelist()\n\n\u2003-\u00a0ServersController::removeOrphanedCorrelations()\n\n\u2003- WorkflowsController::rebuildRedis()\n\n\n\n\n\n\nThe patch adds allowMethod(['post']) to each action, preventing them from being triggered through ordinary GET requests.\n\n\nFor purgeUnusedPictures(), the corresponding UI previously used $.get(). The fix converts that request to POST and supplies X-CSRF-Token, while the controller enables header-only CSRF validation for that AJAX action.\n\n\nBecause GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.\n\nVersion affected: \u22642.5.45"}], "id": "CVE-2026-91857", "lastModified": "2026-09-15T14:17:48.170", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/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": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-91857", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-15T13:10:25.729586Z", "version": "2.0.3"}}]}, "published": "2026-09-15T10:17:06.267", "references": [{"source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "url": "https://github.com/MISP/MISP/commit/b4a5486b5"}], "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.5.46)"}}], "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": "2026-09-15T10:30:12.598090+00:00", "updated": "2026-09-15T10:30:12.598118+00:00", "vendors": ["misp", "misp$PRODUCT$misp"]}