{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90957", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-14T13:02:53.577Z", "datePublished": "2026-09-14T13:03:01.748Z", "dateUpdated": "2026-09-14T13:58:30.297Z"}, "containers": {"cna": {"affected": [{"modules": ["RestResponseComponent (sendFile / sandboxInlineFile)", "OrganisationsController (getOrgLogo)", "Server model (enable_svg_logos setting)"], "product": "MISP", "programFiles": ["app/Controller/Component/RestResponseComponent.php", "app/Controller/OrganisationsController.php", "app/Model/Server.php"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThan": "2.5.46", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "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></p><p>Affected versions of MISP serve uploaded SVG images inline without a restrictive browser sandbox.</p>\n<p>The commit explains that SVG files are XML documents rather than passive bitmap images. While scripts inside SVG do not execute when the SVG is rendered through a normal <code>&lt;img&gt;</code>, they can execute when the SVG is navigated to directly or embedded as a document. In that case, malicious <code>&lt;script&gt;</code> elements, event handlers, or <code>javascript:</code> URLs execute on the MISP origin with the viewer\u2019s session.</p>\n<p>The affected use cases include:</p><p></p>\u2003- organisation SVG logos;<br><div>\u2003-&nbsp;event-report SVG pictures.</div><div><br></div><p></p><p>Importantly, the vulnerable behavior is on the <strong>serve path</strong>, not merely the upload path: the patch notes that a malicious SVG uploaded while SVG support was enabled could remain dangerous even after uploads were later disabled.</p><p></p><p>Version affected: \u22642.5.45<br></p>"}], "value": "Affected versions of MISP serve uploaded SVG images inline without a restrictive browser sandbox.\n\n\nThe commit explains that SVG files are XML documents rather than passive bitmap images. 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When a file is served inline (download=false) and its type is SVG (svg, svgz, or image/svg+xml), the response is augmented with a Content-Security-Policy header containing the sandbox directive (which assigns an opaque origin and disables script execution, plugins, and form submission) along with restrictive default-src, style-src, img-src, and font-src directives that still permit rendering of inline styles, embedded raster images, and data: fonts. An X-Content-Type-Options: nosniff header is also set. The method is invoked from both the generic sendFile() path and the org-logo endpoint. The enable_svg_logos setting description is updated to warn administrators that SVG files remain XML documents and should be left disabled unless required."}], "title": "MISP: Stored XSS via Inline-Served SVG Organisation Logos and Report Pictures", "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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Adds a new PHPUnit test file RestResponseSandboxInlineFileTest.php with cases covering SVG extension, MIME type, svgz, case-insensitivity, and confirmation that raster types (png, jpg, jpeg, gif, webp) and null/empty types receive no headers.", "patchTruncated": false, "patches": [{"commit": "86496aecc35565c121820b8e60eac9508a516eb3", "patchSha256": "e2053fbcffe3476b10ba07239b8772c7760ad987e4574c0bff75f68f8cc05c98", "source": "https://github.com/MISP/MISP/commit/86496aecc.patch", "sourceUrl": "https://github.com/MISP/MISP/commit/86496aecc.patch", "subject": "fix: [security] Sandbox inline-served SVG images"}], "source": "https://github.com/MISP/MISP/commit/86496aecc.patch", "subject": "fix: [security] Sandbox inline-served SVG images", "tagVersionBoundary": {"commits_after_fix": 186, "repository": "https://github.com/MISP/MISP", "tag": "v2.5.46", "version": "2.5.46", "version_type": "semver"}, "weaknessRationale": [{"cweId": "CWE-79", "rationale": "The core issue is that user-supplied SVG content (an XML document capable of embedding script) is served inline on the application origin without any mechanism to prevent script execution, resulting in stored XSS. 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{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90957", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-14T13:02:53.577Z", "datePublished": "2026-09-14T13:03:01.748Z", "dateUpdated": "2026-09-14T13:58:30.297Z"}, "containers": {"cna": {"affected": [{"modules": ["RestResponseComponent (sendFile / sandboxInlineFile)", "OrganisationsController (getOrgLogo)", "Server model (enable_svg_logos setting)"], "product": "MISP", "programFiles": ["app/Controller/Component/RestResponseComponent.php", "app/Controller/OrganisationsController.php", "app/Model/Server.php"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThan": "2.5.46", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "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></p><p>Affected versions of MISP serve uploaded SVG images inline without a restrictive browser sandbox.</p>\n<p>The commit explains that SVG files are XML documents rather than passive bitmap images. 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When a file is served inline (download=false) and its type is SVG (svg, svgz, or image/svg+xml), the response is augmented with a Content-Security-Policy header containing the sandbox directive (which assigns an opaque origin and disables script execution, plugins, and form submission) along with restrictive default-src, style-src, img-src, and font-src directives that still permit rendering of inline styles, embedded raster images, and data: fonts. An X-Content-Type-Options: nosniff header is also set. The method is invoked from both the generic sendFile() path and the org-logo endpoint. The enable_svg_logos setting description is updated to warn administrators that SVG files remain XML documents and should be left disabled unless required."}], "title": "MISP: Stored XSS via Inline-Served SVG Organisation Logos and Report Pictures", "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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Adds a new PHPUnit test file RestResponseSandboxInlineFileTest.php with cases covering SVG extension, MIME type, svgz, case-insensitivity, and confirmation that raster types (png, jpg, jpeg, gif, webp) and null/empty types receive no headers.", "patchTruncated": false, "patches": [{"commit": "86496aecc35565c121820b8e60eac9508a516eb3", "patchSha256": "e2053fbcffe3476b10ba07239b8772c7760ad987e4574c0bff75f68f8cc05c98", "source": "https://github.com/MISP/MISP/commit/86496aecc.patch", "sourceUrl": "https://github.com/MISP/MISP/commit/86496aecc.patch", "subject": "fix: [security] Sandbox inline-served SVG images"}], "source": "https://github.com/MISP/MISP/commit/86496aecc.patch", "subject": "fix: [security] Sandbox inline-served SVG images", "tagVersionBoundary": {"commits_after_fix": 186, "repository": "https://github.com/MISP/MISP", "tag": "v2.5.46", "version": "2.5.46", "version_type": "semver"}, "weaknessRationale": [{"cweId": "CWE-79", "rationale": "The core issue is that user-supplied SVG content (an XML document capable of embedding script) is served inline on the application origin without any mechanism to prevent script execution, resulting in stored XSS. The fix neutralises the script-execution capability via a sandboxing CSP."}, {"cweId": "CWE-693", "rationale": "The upload-time restriction (enable_svg_logos) was the only protection, and it was insufficient because (a) it could be toggled off after files were already stored, and (b) it did not address the serve path at all. The serve path lacked its own protection mechanism (sandboxing CSP), which is what the patch adds."}]}}}, "recordType": "advisory", "vulnId": "GCVE-1-2026-20098"}]}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-90957", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-14T13:58:18.267352Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-14T13:58:24.824Z"}}]}}

{"affected": [{"affectedData": [{"modules": ["RestResponseComponent (sendFile / sandboxInlineFile)", "OrganisationsController (getOrgLogo)", "Server model (enable_svg_logos setting)"], "product": "MISP", "programFiles": ["app/Controller/Component/RestResponseComponent.php", "app/Controller/OrganisationsController.php", "app/Model/Server.php"], "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 serve uploaded SVG images inline without a restrictive browser sandbox.\n\n\nThe commit explains that SVG files are XML documents rather than passive bitmap images. While scripts inside SVG do not execute when the SVG is rendered through a normal <img>, they can execute when the SVG is navigated to directly or embedded as a document. In that case, malicious <script> elements, event handlers, or javascript: URLs execute on the MISP origin with the viewer\u2019s session.\n\n\nThe affected use cases include:\n\n\n\n\u2003- organisation SVG logos;\n\u2003-\u00a0event-report SVG pictures.\n\n\n\n\n\n\nImportantly, the vulnerable behavior is on the serve path, not merely the upload path: the patch notes that a malicious SVG uploaded while SVG support was enabled could remain dangerous even after uploads were later disabled.\n\n\n\nVersion affected: \u22642.5.45"}], "id": "CVE-2026-90957", "lastModified": "2026-09-16T13:42:47.970", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-90957", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T13:58:18.267352Z", "version": "2.0.3"}}]}, "published": "2026-09-14T13:19:32.907", "references": [{"source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "url": "https://github.com/MISP/MISP/commit/86496aecc"}], "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-693"}], "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "type": "Secondary"}]}

{}