{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34588", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-30T16:56:30.999Z", "datePublished": "2026-04-06T15:31:57.602Z", "dateUpdated": "2026-04-07T03:56:03.547Z"}, "containers": {"cna": {"title": "OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}, {"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": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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-588r-cr5c-w6hf", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf"}, {"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": ">= 3.1.0, <= 3.1.13", "status": "affected"}, {"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": "2026-04-07T03:07:58.463Z"}, "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 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9."}], "source": {"advisory": "GHSA-588r-cr5c-w6hf", "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-2026-34588"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-07T03:56:03.547Z"}}]}}

{}

{"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 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9."}], "id": "CVE-2026-34588", "lastModified": "2026-04-07T04:17:16.753", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.6, "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": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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": "2026-04-06T16:16:35.893", "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-588r-cr5c-w6hf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "OpenEXR: OpenEXR: Arbitrary code execution and information disclosure via crafted EXR file", "id": "2455408", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455408"}, "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, an image storage format for the motion picture industry. A remote attacker could exploit an integer overflow vulnerability in the `internal_exr_undo_piz()` function by providing a specially crafted EXR file. This flaw leads to out-of-bounds reads and writes, which may allow for arbitrary code execution or sensitive information disclosure."], "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-2026-34588", "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": "2026-04-06T15:31:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34588\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34588\nhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf"], "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-06T20:07:18.661139+00:00", "value": {"mitigation_remediation": ["Upgrade OpenEXR to a patched version (3.2.7, 3.3.9, or 3.4.9).", "If immediate upgrade is not possible, refuse or quarantine any untrusted EXR files until a patch is applied.", "Verify that all applications linking to OpenEXR are updated to use the patched library."], "summary": {"action": "Patch Immediately", "impact": "Out-of-Bounds Read/Write Leading to Potential Memory Corruption"}, "threat_synthesis": {"affected_systems": "Affected is the AcademySoftwareFoundation OpenEXR library across versions 3.1.0 through before 3.2.7, 3.3.9, and 3.4.9. Any software that incorporates these versions\u2014such as motion\u2011picture industry pipelines that use EXR for high\u2011dynamic\u2011range imagery\u2014may be vulnerable when processing crafted files.", "description_and_impact": "The vulnerability stems from a signed 32\u2011bit integer overflow in the PIZ wavelet decoder routine of OpenEXR. The internal_exr_undo_piz function advances a wavelet pointer using signed 32\u2011bit arithmetic with dimensions represented as int. An attacker can craft an EXR file that causes this counter to wrap, leading the decoder to operate on an incorrect address. Because the decode path processes data in place, this results in both out\u2011of\u2011bounds reads and writes, enabling arbitrary memory corruption that could compromise program integrity or confidentiality.", "risk_and_exploitability": "With a CVSS score of 8.6 the vulnerability is classified as high severity. The EPSS score is not reported and the issue is not listed in the CISA KEV catalog, indicating that large\u2011scale exploitation has not yet been documented. The likely attack vector is the delivery of a malicious EXR file through any medium that allows the application to read a file, as the payload is fully contained within the file (inferred). Because the flaw permits arbitrary memory reads and writes, a compromised process could potentially lead to privilege escalation or arbitrary code execution, although such exploitation is not directly described in the advisory."}}}}, "created": "2026-04-06T21:32:13.987973+00:00", "updated": "2026-04-06T21:32:13.988001+00:00", "vendors": []}