{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107227", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-07T14:34:14.817Z", "datePublished": "2026-10-07T20:51:04.823Z", "dateUpdated": "2026-10-07T20:51:04.823Z"}, "containers": {"cna": {"title": "AsyncHttpClient: Unbounded WebSocket permessage-deflate decompression enables a decompression-bomb denial of service when compression is enabled", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-409", "lang": "en", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x8v2-478q-2hvg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x8v2-478q-2hvg"}, {"name": "https://github.com/AsyncHttpClient/async-http-client/commit/b61637f30327f314b7693418f12ce141ac6b2b30", "tags": ["x_refsource_MISC"], "url": "https://github.com/AsyncHttpClient/async-http-client/commit/b61637f30327f314b7693418f12ce141ac6b2b30"}, {"name": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14", "tags": ["x_refsource_MISC"], "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14"}], "affected": [{"vendor": "AsyncHttpClient", "product": "async-http-client", "versions": [{"version": ">= 3.0.0, < 3.0.14", "status": "affected"}, {"version": ">= 2.2.0, <= 2.16.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-07T20:51:04.823Z"}, "descriptions": [{"lang": "en", "value": "The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompression is unbounded when compression is enabled. The inbound pipeline aggregates compressed frames before WebSocketClientCompressionHandler inflates them, so webSocketMaxFrameSize and webSocketMaxBufferSize do not bound decompressed output. A malicious WebSocket peer can send a small compressed message that expands to a very large Netty buffer and exhausts JVM heap. This issue is fixed in version 3.0.14."}], "source": {"advisory": "GHSA-x8v2-478q-2hvg", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "async-http-client", "vendor": "AsyncHttpClient", "versions": [{"status": "affected", "version": ">= 3.0.0, < 3.0.14"}, {"status": "affected", "version": ">= 2.2.0, <= 2.16.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompression is unbounded when compression is enabled. The inbound pipeline aggregates compressed frames before WebSocketClientCompressionHandler inflates them, so webSocketMaxFrameSize and webSocketMaxBufferSize do not bound decompressed output. A malicious WebSocket peer can send a small compressed message that expands to a very large Netty buffer and exhausts JVM heap. This issue is fixed in version 3.0.14."}], "id": "CVE-2026-107227", "lastModified": "2026-10-07T21:17:14.283", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-07T21:17:14.283", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/AsyncHttpClient/async-http-client/commit/b61637f30327f314b7693418f12ce141ac6b2b30"}, {"source": "security-advisories@github.com", "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14"}, {"source": "security-advisories@github.com", "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x8v2-478q-2hvg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-409"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}