CVE-2026-29112

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{"affected": [{"affectedData": [{"product": "dicebear", "vendor": "dicebear", "versions": [{"status": "affected", "version": "< 9.4.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:dicebear:dicebear:*:*:*:*:*:*:*:*", "matchCriteriaId": "37C4F08A-FD88-4799-B9C7-85D60DB0FE0D", "versionEndExcluding": "9.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "DiceBear is an avatar library for designers and developers. Prior to version 9.4.0, the `ensureSize()` function in `@dicebear/converter` read the `width` and `height` attributes from the input SVG to determine the output canvas size for rasterization (PNG, JPEG, WebP, AVIF). An attacker who can supply a crafted SVG with extremely large dimensions (e.g. `width=\"999999999\"`) could force the server to allocate excessive memory, leading to denial of service. This primarily affects server-side applications that pass untrusted or user-supplied SVGs to the converter's `toPng()`, `toJpeg()`, `toWebp()`, or `toAvif()` functions. Applications that only convert self-generated DiceBear avatars are not practically exploitable, but are still recommended to upgrade. This is fixed in version 9.4.0. The `ensureSize()` function no longer reads SVG attributes to determine output size. Instead, a new `size` option (default: 512, max: 2048) controls the output dimensions. Invalid values (NaN, negative, zero, Infinity) fall back to the default. If upgrading is not immediately possible, validate and sanitize the `width` and `height` attributes of any untrusted SVG input before passing it to the converter."}, {"lang": "es", "value": "DiceBear es una biblioteca de avatares para dise\u00f1adores y desarrolladores. Antes de la versi\u00f3n 9.4.0, la funci\u00f3n 'ensureSize()' en '@dicebear/converter' le\u00eda los atributos 'width' y 'height' del SVG de entrada para determinar el tama\u00f1o del lienzo de salida para la rasterizaci\u00f3n (PNG, JPEG, WebP, AVIF). Un atacante que pueda proporcionar un SVG manipulado con dimensiones extremadamente grandes (por ejemplo, 'width=\"999999999\"') podr\u00eda forzar al servidor a asignar memoria excesiva, lo que llevar\u00eda a una denegaci\u00f3n de servicio. Esto afecta principalmente a las aplicaciones del lado del servidor que pasan SVGs no confiables o proporcionados por el usuario a las funciones 'toPng()', 'toJpeg()', 'toWebp()' o 'toAvif()' del conversor. Las aplicaciones que solo convierten avatares DiceBear autogenerados no son pr\u00e1cticamente explotables, pero a\u00fan as\u00ed se recomienda actualizarlas. Esto se ha solucionado en la versi\u00f3n 9.4.0. La funci\u00f3n 'ensureSize()' ya no lee los atributos SVG para determinar el tama\u00f1o de salida. En su lugar, una nueva opci\u00f3n 'size' (predeterminado: 512, m\u00e1ximo: 2048) controla las dimensiones de salida. Los valores no v\u00e1lidos (NaN, negativo, cero, Infinito) vuelven al valor predeterminado. Si la actualizaci\u00f3n no es posible de inmediato, valide y sanee los atributos 'width' y 'height' de cualquier entrada SVG no confiable antes de pasarla al conversor."}], "id": "CVE-2026-29112", "lastModified": "2026-06-17T10:29:37.180", "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-2026-29112", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-18T19:43:55.471633Z", "version": "2.0.3"}}]}, "published": "2026-03-18T04:17:16.037", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/dicebear/dicebear/commit/42a59eac46a3c68598859e608ec45e578b27614a"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/dicebear/dicebear/releases/tag/v9.4.0"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/dicebear/dicebear/security/advisories/GHSA-v3r3-4qgc-vw66"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,9.4.0)"}}], "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": "2026-03-18T20:52:05.348731+00:00", "value": {"mitigation_remediation": ["Upgrade DiceBear to version 9.4.0 or later. This release removes the vulnerable width/height read and imposes a maximum size of 2048.", "If upgrading immediately is not possible, validate and sanitize the width and height attributes of any untrusted SVG input before passing it to the converter\u2019s toPng(), toJpeg(), toWebp(), or toAvif() functions. Reject values outside a safe range or normalize them to the default size."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service via Memory Exhaustion"}, "threat_synthesis": {"affected_systems": "All versions of the DiceBear library before 9.4.0 are affected. The vulnerability can be exercised in server\u2011side applications that pass untrusted or user\u2011supplied SVGs to the converter\u2019s toPng(), toJpeg(), toWebp(), or toAvif() functions. Applications that only generate internal DexBear avatars are less likely to be exploitable but are still recommended to upgrade because the insecure code path remains present until version 9.4.0 is deployed. The affected product is dicebear:dicebear across all unspecified versions, as indicated by the CPE entry.", "description_and_impact": "DiceBear\u2019s @dicebear/converter library prior to version 9.4.0 contains a memory allocation flaw within its ensureSize() function. The function reads the width and height attributes supplied in an input SVG to calculate the output canvas size for rasterization, leading to uncontrolled memory allocation. An attacker who can supply a crafted SVG with extremely large dimensions (for example, width=\"999999999\") could force the server to allocate an excessive amount of memory, causing a denial of service. The weakness is identified as CWE-770, Memory Allocation or Reallocation with Excessive Size, and impacts availability; it does not directly compromise confidentiality or integrity.", "risk_and_exploitability": "The CVSS base score is 7.5, reflecting a high severity. The EPSS score is reported as less than 1%, suggesting a low current probability of exploitation, and the vulnerability is not listed in CISA\u2019s KEV catalog. The likely attack vector is server\u2011side exploitation: a web application that accepts user\u2011submitted SVG files and processes them through the DiceBear converter. Exploitation requires the ability to control the SVG\u2019s dimensions; once an extreme size triggers memory allocation, the application may crash or become unresponsive. Given the high impact and modest exploitation likelihood, organizations should consider this a high\u2011priority patching opportunity."}}}}, "created": "2026-03-18T10:42:02.030074+00:00", "updated": "2026-03-24T10:59:31.473739+00:00", "vendors": ["dicebear", "dicebear$PRODUCT$dicebear"]}