{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67240", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-28T19:50:39.438Z", "datePublished": "2026-09-23T20:19:22.703Z", "dateUpdated": "2026-09-24T14:24:51.504Z"}, "containers": {"cna": {"title": "RabbitMQ: ReDoS via AMQP 1.0 SQL filter LIKE wildcard", "problemTypes": [{"descriptions": [{"cweId": "CWE-1333", "lang": "en", "description": "CWE-1333: Inefficient Regular Expression Complexity", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 2.3, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-59c5-553c-57m2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-59c5-553c-57m2"}, {"name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7"}, {"name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1"}], "affected": [{"vendor": "rabbitmq", "product": "rabbitmq-server", "versions": [{"version": ">= 4.2.0, < 4.2.7", "status": "affected"}, {"version": ">= 4.3.0, < 4.3.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-23T20:19:22.703Z"}, "descriptions": [{"lang": "en", "value": "RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, pattern_to_regex maps % -> .*? and _ -> ., then compiles ^...$ with only [unicode]; re:run is called with only [{capture, none}] - no explicit match_limit. A pattern like %_%_..._%X becomes ^.*?..*?.....*?.X$ with overlapping lazy quantifiers. The whole-expression cap is ?MAX_EXPRESSION_LENGTH=4096 chars / ?MAX_TOKENS=200; a LIKE string literal is one token, so ~2000 %_ pairs fit. SQL filters are accepted unconditionally at rabbit_amqp_session.erl:3264 (no feature flag). Evaluated per-message at rabbit_stream_queue.erl:1439. OTP's default 10M match_limit caps each match at ~100-200 ms (not seconds), and the re NIF yields to the scheduler. An authenticated AMQP 1.0 consumer with read+write on a stream queue can cause ~100-200 ms of CPU per delivered message via a crafted LIKE filter, multiplied across thousands of messages and parallel sessions - a substantial backtracking-driven CPU amplification. Preconditions include AMQP 1.0 with stream queues in use Attacker can attach a receiver with a filter (read permission) and publish messages with long property values (write permission). This issue is fixed in versions 4.2.7 and 4.3.1."}], "source": {"advisory": "GHSA-59c5-553c-57m2", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-59c5-553c-57m2", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-24T14:24:20.497820Z", "id": "CVE-2026-67240", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-24T14:24:51.504Z"}}]}}

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{"bugzilla": {"description": "RabbitMQ: RabbitMQ: Denial of Service via crafted AMQP 1.0 SQL LIKE filter", "id": "2539764", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2539764"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1333", "details": ["A flaw was found in RabbitMQ, a messaging and streaming broker. An authenticated AMQP 1.0 consumer with read and write permissions on a stream queue can exploit a Regular Expression Denial of Service (ReDoS) vulnerability. This occurs when a crafted LIKE filter is processed, leading to excessive CPU consumption due to inefficient regular expression evaluation. This can result in a denial of service, impacting the availability of the RabbitMQ service."], "name": "CVE-2026-67240", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Will not fix", "package_name": "rabbitmq-server4.2", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rabbitmq-server4.3", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-23T20:19:22Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67240\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67240\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1\nhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-59c5-553c-57m2"], "threat_severity": "Moderate"}

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