{"id":"CVE-2026-49432","kind":"vulnerability","aliases":["CVE-2026-49432","GHSA-xjwq-9jw5-jf7w"],"related":[],"title":"Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp has an Improper Input Validation vulnerability","description":"Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp.\n\nA remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure.\nThis issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Stomp: before 5.19.8, from 6.0.0 before 6.2.7.\n\n\n\n\nUsers are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.","summary":"A negative content-length in a STOMP frame can make the ActiveMQ STOMP connector exhaust memory on the NIO transport or drop the connection on the blocking transport. An unauthenticated remote peer that can reach the STOMP connector can cause denial of service.","severity":"high","cvss":7.5,"epss":0.00785,"exploited":false,"exploited_at":null,"products":[{"name":"org.apache.activemq:apache-activemq","fixed":["5.19.8"],"affected":"< 5.19.8","ecosystem":"maven"},{"name":"org.apache.activemq:apache-activemq","fixed":["6.2.7"],"affected":">= 6.0.0, < 6.2.7","ecosystem":"maven"},{"name":"org.apache.activemq:activemq-all","fixed":["5.19.8"],"affected":"< 5.19.8","ecosystem":"maven"},{"name":"org.apache.activemq:activemq-all","fixed":["6.2.7"],"affected":">= 6.0.0, < 6.2.7","ecosystem":"maven"},{"name":"org.apache.activemq:activemq-stomp","fixed":["5.19.8"],"affected":"< 5.19.8","ecosystem":"maven"},{"name":"org.apache.activemq:activemq-stomp","fixed":["6.2.7"],"affected":">= 6.0.0, < 6.2.7","ecosystem":"maven"},{"name":"apache activemq","fixed":["5.19.8"],"affected":"< 5.19.8","ecosystem":"vendor"},{"name":"apache activemq","fixed":["6.2.7"],"affected":">= 6.0.0, < 6.2.7","ecosystem":"vendor"}],"ecosystems":["maven","vendor"],"tags":["activemq","cwe-20","cwe-839","java","message-broker","package","stomp"],"not_affected_if":["internal-network-only","stomp-connector-disabled"],"how_to_check":"- Check the ActiveMQ version in use with the Maven dependency `org.apache.activemq:apache-activemq`, `activemq-all` or `activemq-stomp`.\n- Check whether a STOMP transport connector is enabled and reachable from untrusted networks in the broker configuration.","fix":"- Upgrade `org.apache.activemq` 5.x to `5.19.8`.\n- Upgrade `org.apache.activemq` 6.x to `6.2.7`.","status":"open","published_at":"2026-06-30T11:16:29+00:00","first_seen_at":"2026-11-05T17:38:59+00:00","triaged_at":"2026-11-05T17:40:03+00:00","updated_at":"2026-11-05T17:40:05+00:00","category":"package","confidence":0.85,"triage":{"at":"2026-11-05T17:40:03Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade `org.apache.activemq` 5.x to `5.19.8`.\n- Upgrade `org.apache.activemq` 6.x to `6.2.7`.","reach":"network","title":"Apache ActiveMQ STOMP: negative content-length causes denial of service","impact":"medium","summary":"A negative content-length in a STOMP frame can make the ActiveMQ STOMP connector exhaust memory on the NIO transport or drop the connection on the blocking transport. An unauthenticated remote peer that can reach the STOMP connector can cause denial of service.","audience":"developers","category":"package","nicknames":[],"who_cares":["activemq","java","stomp","message-broker"],"confidence":0.85,"fix_status":"available","needs_auth":"no","worst_case":"Broker crashes or runs out of memory, stopping message delivery","analyst_note":"","how_to_check":"- Check the ActiveMQ version in use with the Maven dependency `org.apache.activemq:apache-activemq`, `activemq-all` or `activemq-stomp`.\n- Check whether a STOMP transport connector is enabled and reachable from untrusted networks in the broker configuration.","plain_action":"","needs_analyst":false,"not_affected_if":["stomp-connector-disabled","internal-network-only"],"who_is_affected":"Teams that run Apache ActiveMQ, the ActiveMQ All bundle or the ActiveMQ STOMP module with a STOMP connector reachable by untrusted peers. Brokers that only accept STOMP from trusted internal networks or do not enable the STOMP connector are less exposed. The sources do not say whether the default configuration enables STOMP.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000796,"input_tokens":4850,"output_tokens":622,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-20':56B '-2026':16A,24A '-49432':17A,25A '-839':58B '5.19.8':199C,208C,217C,231C '6.0.0':201C,210C,219C '6.2.7':203C,212C,221C,229C '9jw5':21A 'abnorm':183C 'activemq':2A,4A,7A,29A,33A,36A,40A,44A,48A,51A,53A,54B,77B,115C,117C,120C,197C,205C,214C 'activemq-all':35A,39A 'activemq-stomp':43A,47A 'affect':189C,195C 'all':37A,41A 'apach':1A,3A,6A,114C,116C,119C,196C,204C,213C 'apache':28A,32A,50A,52A 'apache-activemq':27A,31A 'attack':153C 'behavior':139C 'beyond':167C 'block':92B,175C 'bodi':157C 'broker':62B 'buffer':166C 'byte':158C 'caus':105B,171C 'closur':192C 'command':165C 'configur':168C 'connect':89B,164C,190C 'connector':79B,103B,132C 'content':68B,145C 'content-length':67B,144C 'cve':15A,23A 'cwe':55B,57B 'denial':106B,136C 'denial-of-servic':135C 'drop':87B 'error':179C 'except':185C 'exhaust':80B 'expos':130C 'fix':233C 'forc':182C 'frame':73B 'ghsa':19A 'ghsa-xjwq-9jw5-jf7w':18A 'grow':160C 'handl':186C 'improp':11A,109C 'input':12A,110C 'instead':181C 'issu':194C,235C 'java':59B 'jf7w':22A 'keep':155C 'length':69B,146C 'limit':169C 'make':75B 'memori':81B 'messag':61B 'message-brok':60B 'negat':66B,143C 'nio':84B,149C 'oom':172C 'org.apache.activemq':26A,30A,34A,38A,42A,46A 'packag':63B 'peer':97B,125C 'per':163C 'per-connect':162C 'protocol':177C 'reach':100B,128C 'recommend':224C 'remot':96B,123C 'send':141C 'servic':108B,138C 'stomp':8A,45A,49A,64B,72B,78B,102B,121C,131C,150C,176C,215C 'stream':156C 'transport':85B,93B,151C,184C 'trigger':134C 'unauthent':95B,124C 'upgrad':226C 'user':222C 'valid':13A,111C 'version':228C 'vulner':14A,112C 'xjwq':20A","nicknames":[],"mitigations":[],"who_affected":"Teams that run Apache ActiveMQ, the ActiveMQ All bundle or the ActiveMQ STOMP module with a STOMP connector reachable by untrusted peers. Brokers that only accept STOMP from trusted internal networks or do not enable the STOMP connector are less exposed. The sources do not say whether the default configuration enables STOMP.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":["activemq","apacheactivemq","orgapacheactivemqactivemqall","orgapacheactivemqactivemqstomp","orgapacheactivemqapacheactivemq"],"ptokens":["activemq","all","apache","org","stomp"],"labels":["activemq","cwe20","cwe839","high","java","maven","messagebroker","package","stomp","vendor"],"campaign_type":null,"first_public_at":"2026-06-30T11:16:29+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_by":"GitHub","poc_count":0,"sources":[{"source":"ghsa","external_id":"GHSA-xjwq-9jw5-jf7w","url":"https://github.com/advisories/GHSA-xjwq-9jw5-jf7w","severity":"high","published_at":"2026-06-30T12:31:52+00:00","modified_at":"2026-11-05T17:33:55+00:00","first_seen_at":"2026-11-05T17:38:59+00:00","fetched_at":"2026-11-05T17:46:22+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-49432","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49432","severity":null,"published_at":"2026-06-30T11:16:29+00:00","modified_at":"2026-07-02T18:43:35+00:00","first_seen_at":"2026-11-05T17:40:05+00:00","fetched_at":"2026-11-05T17:40:05+00:00","note":null}],"documents":[{"id":78070,"url":"https://github.com/apache/activemq/pull/2064","title":"Patch: github.com","kind":"other","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":78071,"url":"https://github.com/apache/activemq/commit/1493db95b5918d4f4a305fd1df8155f57c38850b","title":"Patch: github.com","kind":"other","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":78072,"url":"https://github.com/apache/activemq/commit/63ca7332a47239964cbf2e343603412254ebb358","title":"Patch: github.com","kind":"other","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":78073,"url":"https://github.com/apache/activemq/commit/713cae920329c4caea016b08300182ec5c6dc99b","title":"Patch: github.com","kind":"other","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":68016,"url":"https://github.com/apache/activemq/releases/tag/activemq-5.19.8","title":"Release: github.com","kind":"release","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release: github.com"},{"id":68017,"url":"https://github.com/apache/activemq/releases/tag/activemq-6.2.7","title":"Release: github.com","kind":"release","source":"ghsa","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release: github.com"},{"id":78149,"url":"https://lists.apache.org/thread/fsjb26605syqr8xks249h8gkp86t55d2","title":"Vendor advisory: lists.apache.org","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Vendor advisory: lists.apache.org"},{"id":78150,"url":"http://www.openwall.com/lists/oss-security/2026/06/29/7","title":"Third-party advisory: www.openwall.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.openwall.com"}],"exploit_sources":[{"type":"epss","score":0.00785,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-49432"}],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}