{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34589", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-30T17:15:52.498Z", "datePublished": "2026-04-06T15:33:03.276Z", "dateUpdated": "2026-04-07T03:56:04.936Z"}, "containers": {"cna": {"title": "OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write", "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "lang": "en", "description": "CWE-190: Integer Overflow or Wraparound", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.4, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x"}, {"name": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7"}, {"name": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9"}, {"name": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"}], "affected": [{"vendor": "AcademySoftwareFoundation", "product": "openexr", "versions": [{"version": ">= 3.2.0, < 3.2.7", "status": "affected"}, {"version": ">= 3.3.0, < 3.3.9", "status": "affected"}, {"version": ">= 3.4.0, < 3.4.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T03:08:13.554Z"}, "descriptions": [{"lang": "en", "value": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9."}], "source": {"advisory": "GHSA-p8xc-w3q4-h64x", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-06T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-34589"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-07T03:56:04.936Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9."}], "id": "CVE-2026-34589", "lastModified": "2026-04-07T04:17:18.430", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.4, "baseSeverity": "HIGH", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-06T16:16:36.040", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "OpenEXR: OpenEXR: Memory corruption leading to arbitrary code execution or denial of service", "id": "2455411", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455411"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["A flaw was found in OpenEXR. The DWA lossy decoder, responsible for processing EXR image files, incorrectly handles large image widths. This occurs because temporary block pointers are constructed using signed 32-bit arithmetic, which can overflow. A remote attacker could exploit this by providing a specially crafted EXR file, leading to memory corruption and potentially arbitrary code execution or denial of service."], "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-2026-34589", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-06T15:33:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34589\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34589\nhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x"], "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-06T19:40:25.380702+00:00", "value": {"mitigation_remediation": ["Upgrade OpenEXR to version 3.2.7 or newer releases (3.3.9/3.4.9)", "Reject or sandbox untrusted DWA images until the library is patched"], "summary": {"action": "Patch Immediately", "impact": "Heap Out-of-Bounds Write"}, "threat_synthesis": {"affected_systems": "The flaw affects AcademySoftwareFoundation OpenEXR versions 3.2.0 through 3.2.6, all versions before 3.3.9, and before 3.4.9. Versions 3.2.7, 3.3.9, and 3.4.9 contain the fix and are therefore not vulnerable.", "description_and_impact": "This vulnerability arises from the DWA lossy decoder in the OpenEXR library. When decoding images with a sufficiently large component width, signed 32\u2011bit arithmetic overflows while calculating temporary block pointers. The overflow results in a pointer that wraps around, allowing the decoder to write beyond the bounds of the allocated heap memory. Such memory corruption can crash the application or, depending on the surrounding context, be leveraged to inject malicious code or alter program behavior. The weakness is reflected in CWE\u2011190 (integer overflow) and CWE\u2011787 (buffer overflow).", "risk_and_exploitability": "The CVSS score of 8.4 classifies this as high severity. Since the vulnerability is triggered by processing a crafted EXR file, it can be exploited when an application loads untrusted images. The absence of an EPSS score and the lack of listing in the CISA KEV catalog suggest that exploitation is currently theoretical, but the high CVSS indicates that an attacker who gains the ability to supply an image can potentially cause denial of service or arbitrary code execution. The likely attack vector is through maliciously crafted image files delivered via local or remote channels to software that incorporates the vulnerable OpenEXR library."}}}}, "created": "2026-04-06T21:32:12.944338+00:00", "updated": "2026-04-06T21:32:12.944366+00:00", "vendors": []}