CVE-2026-56376
Full vulnerability record from the local CVENow database.
Description
ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing a denial of service.
Severity
MEDIUM
CVSS score
6.3
(v4.0)
Vulnerability status
Analyzed
Source identifier
Published
2026-06-23 13:16:46.397000
Last modified
2026-10-29 21:17:25.727000
View original CVE JSON
{
"id": "CVE-2026-56376",
"sourceIdentifier": "[email protected]",
"published": "2026-06-23T13:16:46.397",
"lastModified": "2026-10-29T21:17:25.727",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing a denial of service."
},
{
"lang": "es",
"value": "ImageMagick anterior a 7.1.2-15 y 6.9.13-40 contiene un uso después de liberación de pila en el codificador meta: cuando la asignación de memoria falla, se escribe un solo byte en un puntero obsoleto. Atacantes remotos pueden activarlo al procesar archivos de imagen especialmente manipulados, causando una denegación de servicio."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "ImageMagick",
"product": "ImageMagick",
"defaultStatus": "unaffected",
"versions": [
{
"version": "7.0.0",
"lessThan": "7.1.2-15",
"versionType": "semver",
"status": "affected"
},
{
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}
]
},
{
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}
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}
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}
],
"metrics": {
"cvssMetricV40": [
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"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/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",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
],
"cvssMetricV31": [
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"cvssData": {
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"availabilityImpact": "LOW"
},
"exploitabilityScore": 2.2,
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},
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"ssvcV203": [
{
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"timestamp": "2026-06-23T13:06:03.212009Z",
"id": "CVE-2026-56376",
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{
"automatable": "no"
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{
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"weaknesses": [
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"type": "Secondary",
"description": [
{
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"value": "CWE-416"
}
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"configurations": [
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"nodes": [
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"matchCriteriaId": "C6F44A65-1733-4752-AAD0-BCCC7BDBC877"
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"references": [
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"url": "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-2gq3-ww97-wfjm",
"source": "[email protected]",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.vulncheck.com/advisories/imagemagick-heap-use-after-free-in-meta-coder",
"source": "[email protected]",
"tags": [
"Third Party Advisory"
]
}
]
}