CVE-2026-27784

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[{"lang": "en", "value": "The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."}, {"lang": "es", "value": "La implementaci\u00f3n de 32 bits de NGINX Open Source tiene una vulnerabilidad en el m\u00f3dulo ngx_http_mp4_module, lo que podr\u00eda permitir a un atacante leer en exceso o sobrescribir la memoria del proceso worker de NGINX, lo que resultar\u00eda en su terminaci\u00f3n, utilizando un archivo MP4 especialmente dise\u00f1ado. El problema solo afecta a NGINX Open Source de 32 bits si est\u00e1 compilado con el m\u00f3dulo ngx_http_mp4_module y la directiva mp4 se utiliza en el archivo de configuraci\u00f3n. Adem\u00e1s, el ataque es posible solo si un atacante puede desencadenar el procesamiento de un archivo MP4 especialmente dise\u00f1ado con el m\u00f3dulo ngx_http_mp4_module.\n\nNota: Las versiones de software que han alcanzado el Fin de Soporte T\u00e9cnico (EoTS) no se eval\u00faan."}], "id": "CVE-2026-27784", "lastModified": "2026-07-15T02:19:10.063", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "f5sirt@f5.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", 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"availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "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": "LOW", "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:L/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": "f5sirt@f5.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27784", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T03:55:53.601160Z", "version": "2.0.3"}}]}, "published": "2026-03-24T15:16:33.350", "references": [{"source": "f5sirt@f5.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://my.f5.com/manage/s/article/K000160364"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:10065"}, {"source": 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[{"description": [{"lang": "en", "value": "CWE-190"}], "source": "f5sirt@f5.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file", "id": "2450785", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450785"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["A flaw was found in NGINX Open Source, specifically within the ngx_http_mp4_module. An attacker can exploit this memory corruption vulnerability by providing a specially crafted MP4 file. This can lead to an over-read or over-write of NGINX worker memory, causing the worker to terminate and resulting in a Denial of Service (DoS). This issue affects 32-bit NGINX Open Source when built with the ngx_http_mp4_module and the mp4 directive is used."], "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-2026-27784", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "nginx", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "nginx:1.24/nginx", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "nginx", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "nginx:1.24/nginx", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "nginx:1.26/nginx", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-24T14:13:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27784\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27784\nhttps://my.f5.com/manage/s/article/K000160364"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.29.0,1.29.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.1.19,1.28.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "NGINX Open Source", "source": "cna", "vendor": "F5"}, "product": "nginx_open_source", "vendor": "f5"}], "analysis": {"en": {"generated_at": "2026-03-30T15:51:16.386784+00:00", "value": {"mitigation_remediation": ["Upgrade to the latest NGINX Open Source release that removes the vulnerability", "If an upgrade is not immediately possible, disable the ngx_http_mp4_module or remove the mp4 directive from the configuration to prevent processing of MP4 files", "Monitor server logs for abnormal MP4 requests and verify that no malicious files are being served"], "summary": {"action": "Immediate Patch", "impact": "Denial of Service through memory corruption"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to 32\u2011bit F5 NGINX Open Source installations that were built with the ngx_http_mp4_module and have the mp4 directive enabled in their configuration. No specific version ranges are listed, so any configured 32\u2011bit build that serves MP4 files is in scope.", "description_and_impact": "A flaw in the 32\u2011bit build of NGINX Open Source within the ngx_http_mp4_module allows an attacker to supply a specially crafted MP4 file that causes the module to read or write outside its intended bounds. The resulting overflow corrupts worker memory, leading the NGINX worker process to terminate. The weakness is a classic integer or arithmetic error, identified as CWE\u2011190, and it does not directly expose data or enable code execution. The outcome is a loss of service when the worker crashes.", "risk_and_exploitability": "The CVSS score of 8.5 indicates high severity. The EPSS score of less than 1% suggests a low likelihood of exploitation, and the vulnerability is not present in the CISA KEV catalog. Attackers must be able to deliver a malicious MP4 file to a server that processes it with the ngx_http_mp4_module; if the conditions are met, the server will crash, causing a denial of service to legitimate users."}}}}, "created": "2026-03-25T11:47:34.399869+00:00", "updated": "2026-03-30T20:58:09.669969+00:00", "vendors": ["f5", "f5$PRODUCT$nginx_open_source"]}