CVE-2026-33418

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{"affected": [{"affectedData": [{"product": "dicebear", "vendor": "dicebear", "versions": [{"status": "affected", "version": "< 9.4.2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*", "matchCriteriaId": "D093A78E-123F-45B2-98DA-50541D0DC041", "versionEndExcluding": "9.4.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "DiceBear is an avatar library for designers and developers. Prior to version 9.4.2, the `ensureSize()` function in `@dicebear/converter` used a regex-based approach to rewrite SVG `width`/`height` attributes, capping them at 2048px to prevent denial of service. This size capping could be bypassed by crafting SVG input that causes the regex to match a non-functional occurrence of `<svg` before the actual SVG root element. When the SVG is subsequently rendered via `@resvg/resvg-js` on the Node.js code path, it renders at the attacker-specified dimensions, potentially causing out-of-memory crashes. In version 9.4.2, the regex-based approach has been replaced with XML-aware processing using `fast-xml-parser` to correctly identify and modify the SVG root element's attributes. Additionally, a `fitTo` constraint has been added to the `renderAsync` call as defense-in-depth, ensuring the rendered output is always bounded regardless of SVG content."}, {"lang": "es", "value": "DiceBear es una biblioteca de avatares para dise\u00f1adores y desarrolladores. Antes de la versi\u00f3n 9.4.2, la funci\u00f3n `ensureSize()` en `@dicebear/converter` utilizaba un enfoque basado en expresiones regulares para reescribir los atributos SVG `width`/`height`, limit\u00e1ndolos a 2048px para prevenir la denegaci\u00f3n de servicio. Esta limitaci\u00f3n de tama\u00f1o pod\u00eda ser eludida creando una entrada SVG que causara que la expresi\u00f3n regular coincidiera con una ocurrencia no funcional de `"}], "id": "CVE-2026-33418", "lastModified": "2026-06-17T10:37:27.807", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33418", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-24T14:10:31.935009Z", "version": "2.0.3"}}]}, "published": "2026-03-24T14:16:30.453", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/dicebear/dicebear/security/advisories/GHSA-7j2x-32w6-p43p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-185"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,9.4.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "dicebear", "source": "cna", "vendor": "dicebear"}, "product": "dicebear", "vendor": "dicebear"}], "analysis": {"en": {"generated_at": "2026-03-24T20:28:11.633230+00:00", "value": {"mitigation_remediation": ["Upgrade dicebear to version 9.4.2 or later.", "Verify that the application uses the updated library.", "If an upgrade is not immediately possible, implement input validation to restrict SVG dimensions.", "Monitor the application for out\u2011of\u2011memory crashes and log errors."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Vulnerable when applications use the DiceBear avatar library version earlier than 9.4.2. The issue affects Node.js projects that import @dicebear/converter and render SVGs through @resvg/resvg-js. All systems that rely on DiceBear to generate avatars, such as web front\u2011ends, APIs, or micro\u2011services, are potentially impacted if they use an affected library version.", "description_and_impact": "The vulnerability resides in the ensureSize() function of @dicebear/converter. Prior to version 9.4.2 the function used a regular\u2011expression to cap width and height attributes at 2048 pixels. Attackers can inject XML comments that cause the expr to misidentify the root &lt;svg&gt; element, allowing the SVG to be rendered with attacker\u2011specified large dimensions by @resvg/resvg-js. This can exhaust memory and crash the Node.js process, resulting in a denial\u2011of\u2011service condition. The weakness maps to CWE\u2011185.", "risk_and_exploitability": "The CVSS score of 7.5 indicates a high severity of service disruption. EPSS data is unavailable, but the vulnerability is not listed in CISA KEV, suggesting no widespread observed exploitation at this time. Likely attack vector involves supplying specially crafted SVG content to a vulnerable application. Because the flaw is within a library, exploitation requires the attacker to deliver malicious SVG data to an application that processes it, which may occur through user\u2011supplied avatar images or internal rendering calls. Once triggered, the exploit can cause an out\u2011of\u2011memory crash, disabling the affected service until the process restarts."}}}}, "created": "2026-03-25T11:47:35.320368+00:00", "updated": "2026-03-25T20:50:13.899051+00:00", "vendors": ["dicebear", "dicebear$PRODUCT$dicebear"]}