CVE-2026-34543

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{"affected": [{"affectedData": [{"product": "openexr", "vendor": "AcademySoftwareFoundation", "versions": [{"status": "affected", "version": ">= 3.4.0, < 3.4.8"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*", "matchCriteriaId": "4E7AA082-2647-4AAD-9902-1E3873882A3D", "versionEndExcluding": "3.2.7", "versionStartIncluding": "3.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*", "matchCriteriaId": "E8321A2E-759A-4B1E-9AAF-0204791F4323", "versionEndExcluding": "3.3.9", "versionStartIncluding": "3.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*", "matchCriteriaId": "088FF356-26BB-4AF4-95A4-B24485E43F02", "versionEndExcluding": "3.4.8", "versionStartIncluding": "3.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 version 3.4.0 to before version 3.4.8, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8."}, {"lang": "es", "value": "OpenEXR proporciona la especificaci\u00f3n y la implementaci\u00f3n de referencia del formato de archivo EXR, un formato de almacenamiento de im\u00e1genes para la industria cinematogr\u00e1fica. Desde la versi\u00f3n 3.4.0 hasta antes de la versi\u00f3n 3.4.8, informaci\u00f3n sensible de la memoria heap puede filtrarse a trav\u00e9s de los datos de p\u00edxeles decodificados (revelaci\u00f3n de informaci\u00f3n). Esto ocurre bajo la configuraci\u00f3n predeterminada; simplemente leer un archivo EXR malicioso es suficiente para activar el problema, sin ninguna interacci\u00f3n del usuario. Este problema ha sido parcheado en la versi\u00f3n 3.4.8."}], "id": "CVE-2026-34543", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "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:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34543", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T13:59:28.075872Z", "version": "2.0.3"}}]}, "published": "2026-04-01T21:17:01.320", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "OpenEXR: OpenEXR: Information disclosure via malicious EXR file", "id": "2454144", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454144"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-824", "details": ["A flaw was found in OpenEXR, an image storage format for the motion picture industry. A remote attacker could exploit this vulnerability by tricking a user into opening a specially crafted EXR file. This could lead to the disclosure of sensitive information from heap memory through the decoded pixel data, without requiring any user interaction."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, avoid opening or processing EXR files from untrusted sources. If the OpenEXR library is not essential for system operations, consider removing packages that depend on it to reduce the potential attack surface."}, "name": "CVE-2026-34543", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "openexr", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-01T20:56:18Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34543\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34543\nhttps://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8\nhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8\nhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432"], "statement": "Moderate. This information disclosure flaw in OpenEXR allows a remote attacker to leak sensitive heap memory data by tricking a user into opening a specially crafted EXR file. This affects Red Hat Enterprise Linux and Fedora systems that process OpenEXR files.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.8)"}}], "enrichment": {"confidence": 82.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 82.0, "source": "matching"}]}, "original": {"product": "openexr", "source": "cna", "vendor": "AcademySoftwareFoundation"}, "product": "openexr", "vendor": "academysoftwarefoundation"}], "analysis": {"en": {"generated_at": "2026-04-07T22:35:47.025289+00:00", "value": {"mitigation_remediation": ["Upgrade OpenEXR to version 3.4.8 or newer.", "If an upgrade is not immediately possible, disable the PXR24 decoder for untrusted files or replace it with a validated decoder.", "Monitor for abnormal memory usage or unfamiliar EXR files in logs.", "Consult the vendor\u2019s advisory and keep the library up to date."], "summary": {"action": "Immediate Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "The exploit affects the Academy Software Foundation\u2019s OpenEXR implementation from version 3.4.0 through 3.4.7 inclusive. Any software that embeds these releases and uses the default PXR24 decoder is susceptible. The issue was addressed in release 3.4.8; systems using that or later versions are no longer impacted.", "description_and_impact": "A heap information\u2011disclosure flaw exists in the PXR24 decompression routine of the OpenEXR image library. When an application decodes a specially crafted EXR file, the library can read beyond the intended buffer and return portions of the heap to the caller. The exposed data is returned as part of the decoded pixel values, allowing an attacker to recover arbitrary memory contents belonging to the process using the library. The weakness originates from a lack of validation of the decompressed size against the original data length, constituting information exposure through overreading.", "risk_and_exploitability": "The vulnerability receives a score of 8.7 on the security rating scale, classifying it as high severity. The probability of exploitation is estimated to be below 1%, and it is not listed in the CISA Known Exploited Vulnerabilities catalog. Attackers can trigger the flaw by delivering a malicious EXR file to the target application without user interaction. The impact is data theft of sensitive information residing in the process heap, which could include credentials, cryptographic keys, or other secrets. Because any process that loads the library is affected, the scope extends from a single user to the entire application and potentially related services that rely on image decoding."}}}}, "created": "2026-04-02T07:47:26.389371+00:00", "updated": "2026-04-08T19:56:48.621631+00:00", "vendors": ["academysoftwarefoundation", "academysoftwarefoundation$PRODUCT$openexr"]}