CVE-2026-40183

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{"bugzilla": {"description": "ImageMagick: Magick.NET: ImageMagick: Denial of Service via heap write overflow in JXL encoder", "id": "2458054", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458054"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in ImageMagick, a software for editing and manipulating digital images. When a user processes an image with the JXL encoder and specifies that it should be encoded as 16-bit floats, a heap write overflow occurs. This vulnerability could allow an attacker to cause a denial of service (DoS) by crashing the application."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-40183", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "ImageMagick", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "ImageMagick", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2026-04-13T21:28:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-40183\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-40183\nhttps://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19\nhttps://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-jvgr-9ph5-m8v4\nhttps://github.com/dlemstra/Magick.NET/releases/tag/14.12.0"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.1.2-19)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "ImageMagick", "source": "cna", "vendor": "ImageMagick"}, "product": "imagemagick", "vendor": "imagemagick"}], "analysis": {"en": {"generated_at": "2026-04-14T01:35:58.039387+00:00", "value": {"mitigation_remediation": ["Upgrade ImageMagick to version 7.1.2\u201119 or newer.", "If an upgrade cannot be applied immediately, avoid using the 16\u2011bit float option when encoding JXL images; consider alternative formats or lower precision. ", "Ensure that applications leveraging ImageMagick verify the trustworthiness of input images and implement defensive checks. ", "Monitor for anomalous crashes or memory corruption indicators that may signal an attempt to exploit the vulnerability."], "summary": {"action": "Patch", "impact": "Heap memory corruption during JXL encoding"}, "threat_synthesis": {"affected_systems": "The issue is present in all ImageMagick releases prior to 7.1.2\u201119. Users running any older version of the ImageMagick product are potentially affected; upgrading to 7.1.2\u201119 or a later release removes the flaw.", "description_and_impact": "ImageMagick contains a heap buffer overflow in its JXL encoder when an image is encoded as 16\u2011bit float. The flaw can corrupt memory in the process and, if an attacker can control the encoding call, could enable arbitrary code execution or cause a denial of service by crashing the application. The vulnerability represents a moderate risk to the integrity of any system that processes untrusted images using this feature.", "risk_and_exploitability": "The CVSS score of 5.5 indicates medium severity. No EPSS data or KEV listing is available, implying limited public evidence of exploitation. Exploitation would require the JXL encoder to be invoked with the 16\u2011bit float option, suggesting an attack vector that relies on maliciously crafted image data processed by an application that performs such encoding. Full exploitation would likely need additional weaknesses in the surrounding environment, but the presence of a heap overflow raises concern for trusted environments or those handling unverified input."}}}}, "created": "2026-04-14T16:17:08.621826+00:00", "updated": "2026-04-14T16:32:59.968435+00:00", "vendors": ["imagemagick", "imagemagick$PRODUCT$imagemagick"]}