{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-119618", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-10-30T12:32:13.904Z", "datePublished": "2026-11-11T14:54:08.155Z", "dateUpdated": "2026-11-13T14:17:19.945Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-11T15:55:23.793Z"}, "title": "Apache HTTP Server: mod_http2: heap corruption and RCE in assign_headers", "problemTypes": [{"descriptions": [{"description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization", "lang": "en", "cweId": "CWE-362", "type": "CWE"}]}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache HTTP Server", "versions": [{"status": "affected", "version": "2.4.55", "lessThanOrEqual": "2.4.70", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"value": "Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE.\n\nThis issue affects Apache HTTP Server: from 2.4.55 through 2.4.70.\nAffected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Concurrent Execution using Shared Resource with Improper Synchronization vulnerability in Apache HTTP Server's mod_http2 in assign_headers() can lead to RCE.<br><span><br>This issue affects Apache HTTP Server: from 2.4.55 through 2.4.70.<br></span><span>Affected releases of mod_h2 from GitHub: from 2.0.8 through 2.0.42.</span></p>"}]}], "references": [{"url": "https://httpd.apache.org/security/vulnerabilities_24.html", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "critical"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "timeline": [{"time": "2026-10-26T12:00:00.000Z", "lang": "en", "value": "reported (Anthropic)"}, {"time": "2026-11-03T15:50:00.000Z", "lang": "en", "value": "reported (Google)"}], "credits": [{"lang": "en", "value": "Anthropic's OSS Scanner, as vulnerability ANT-2026-MAPKT6MZ", "type": "finder"}, {"lang": "en", "value": "Anthony Weems and Simon Scannell of the Google Cloud Vulnerability Research", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-12T20:56:56.991Z"}, "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/11/11/13"}, {"url": "https://access.redhat.com/security/cve/cve-2026-119618"}, {"url": "https://www.wiz.io/blog/cve-2026-119618-rce-apache-http-server-vulnerability"}, {"url": "https://github.com/microsoft/azurelinux/pull/20165"}, {"url": "https://bugs.gentoo.org/986161"}, {"url": "https://github.com/AlmaLinux/updates/issues/4252"}, {"url": "https://ubuntu.com/security/CVE-2026-119618"}], "title": "CVE Program Container", "x_generator": {"engine": "ADPogram 0.0.1"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-11-13T14:17:15.903768Z", "id": "CVE-2026-119618", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-13T14:17:19.945Z"}}]}}

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{"acknowledgement": "Red Hat would like to thank Anthony Weems (Google Cloud Vulnerability Research) and Simon Scannell (Google Cloud Vulnerability Research) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2026:98978", "cpe": "cpe:/o:redhat:enterprise_linux:10.3", "impact": "important", "package": "mod_http2-0:2.0.29-5.el10_3.1", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98953", "cpe": "cpe:/o:redhat:enterprise_linux_eus:10.0", "package": "mod_http2-0:2.0.29-2.el10_0.3", "product_name": "Red Hat Enterprise Linux 10.0 Extended Update Support", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98979", "cpe": "cpe:/o:redhat:enterprise_linux_eus:10.2", "package": "mod_http2-0:2.0.29-4.el10_2.3", "product_name": "Red Hat Enterprise Linux 10.2 Extended Update Support", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98981", "cpe": "cpe:/a:redhat:enterprise_linux:9", "impact": "important", "package": "mod_http2-0:2.0.26-7.el9_9.1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98968", "cpe": "cpe:/a:redhat:rhel_e4s:9.4", "package": "mod_http2-0:2.0.26-2.el9_4.4", "product_name": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98954", "cpe": "cpe:/a:redhat:rhel_eus:9.6", "package": "mod_http2-0:2.0.26-4.el9_6.3", "product_name": "Red Hat Enterprise Linux 9.6 Extended Update Support", "release_date": "2026-11-11T00:00:00Z"}, {"advisory": "RHSA-2026:98982", "cpe": "cpe:/a:redhat:rhel_eus:9.8", "package": "mod_http2-0:2.0.26-6.el9_8.3", "product_name": "Red Hat Enterprise Linux 9.8 Extended Update Support", "release_date": "2026-11-11T00:00:00Z"}], "bugzilla": {"description": "httpd:2.4/mod_http2: mod_http2: httpd: Remote code execution in mod_http2", "id": "2567318", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567318"}, "csaw": true, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["A flaw was found in the mod_http2 module of the Apache HTTP Server (httpd), the standard web server used across Red Hat Enterprise Linux and other products. HTTP/2 allows a client to send many requests at the same time over a single connection, and the module handles these concurrent requests using multiple threads. Due to a thread-safety flaw, one thread can modify memory that belongs to another thread, corrupting the server's internal memory. A remote attacker who can reach the web server could exploit this flaw to execute arbitrary commands on the server without any authentication, potentially leading to a complete takeover of the affected system, unauthorized access to sensitive data, and service disruption. Only servers that have HTTP/2 enabled are affected; servers configured to serve only HTTP/1.1 are not vulnerable."], "name": "CVE-2026-119618", "package_state": [{"cpe": "cpe:/o:redhat:rhel_els:6", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:rhel_els:7", "fix_state": "Not affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "httpd:2.4/mod_http2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "jbcs-httpd24-mod_http2", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2026-11-11T12:52:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-119618\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-119618"], "statement": "The Red Hat Product Security team has assessed the severity of this vulnerability as Critical. It allows unauthenticated remote code execution, and public research has demonstrated a reliable exploit against a default-configured server with the mod_http2 module enabled. Successful exploitation allows an attacker to execute arbitrary commands, gain full control of the server process, and access or modify sensitive information.\nThe vulnerability's root cause is a thread-safety flaw in the mod_http2 module's handling of concurrent HTTP/2 requests: a worker thread writes into memory owned by the connection thread through a shared, lock-free allocator. This issue affects servers with HTTP/2 (h2 or h2c) enabled via the Protocols directive; servers serving only HTTP/1.1 are not affected.\nBecause exploitation depends on HTTP/2 stream workers sharing an allocator with the connection, the severity of this flaw varies across Red Hat products. The mod_http2 packages shipped in Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10 allocate each HTTP/2 stream from a separate allocator, which substantially increases the complexity of exploiting the flaw. The severity for Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10 is therefore rated Important rather than Critical. Versions of mod_http2 prior to 2.0.8 do not contain the affected code, and Red Hat Enterprise Linux 8 and earlier are not affected. Refer to the affected packages table for the severity assigned to each Red Hat product.", "threat_severity": "Critical"}