{"id":"CVE-2026-77410","kind":"vulnerability","aliases":["CVE-2026-77410","GHSA-r9c8-gcjp-xfwh","GO-2026-6500"],"related":[],"title":"RabbitMQ amqp091-go: Resource Exhaustion (OOM) via Unbounded Body Buffer Allocation in github.com/rabbitmq/amqp091-go","description":"RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.recvContent in channel.go preallocates the message body slice with the uint64 ch.header.Size value supplied by an AMQP content header without capping the allocation to the negotiated Connection.Config.FrameSize value. A malicious or compromised broker can send an extreme declared body size and cause the Go runtime to attempt a correspondingly large allocation before body data is received. The allocation can exhaust memory and terminate the client process. This issue is fixed in version 1.13.0.","summary":"The amqp091-go Go client preallocates a message body buffer using the size declared in an AMQP content header without capping it. A malicious or compromised RabbitMQ broker can declare an enormous body size and make the client process run out of memory and crash.","severity":"high","cvss":8.9,"epss":0.00524,"exploited":false,"exploited_at":null,"products":[{"name":"github.com/rabbitmq/amqp091-go","fixed":["1.13.0"],"affected":"< 1.13.0","ecosystem":"go"}],"ecosystems":["go"],"tags":["amqp","go","package","rabbitmq"],"not_affected_if":["no-amqp091-go-dependency","version-1.13.0-or-later"],"how_to_check":"Run `go list -m github.com/rabbitmq/amqp091-go` in the project and check whether the version is below 1.13.0.","fix":"Upgrade github.com/rabbitmq/amqp091-go to 1.13.0 or later.","status":"open","published_at":"2026-09-16T15:17:50+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","triaged_at":"2026-10-23T21:43:50+00:00","updated_at":"2026-10-23T21:43:50+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-23T21:43:50Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade github.com/rabbitmq/amqp091-go to 1.13.0 or later.","reach":"network","impact":"low","summary":"The amqp091-go Go client preallocates a message body buffer using the size declared in an AMQP content header without capping it. A malicious or compromised RabbitMQ broker can declare an enormous body size and make the client process run out of memory and crash.","category":"package","who_cares":["go","rabbitmq","amqp"],"confidence":0.7,"needs_auth":"no","worst_case":"Client process crashes from memory exhaustion when a hostile broker sends a huge size","analyst_note":"","how_to_check":"Run `go list -m github.com/rabbitmq/amqp091-go` in the project and check whether the version is below 1.13.0.\nunknown","needs_analyst":false,"not_affected_if":["version-1.13.0-or-later","no-amqp091-go-dependency"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000484,"input_tokens":3048,"output_tokens":358,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':18A,26A,29A '-6500':27A '-77410':19A,30A '/rabbitmq/amqp091-go':16A,33A '0.9.1':92C '1.13.0':96C,169C 'alloc':12A,119C,147C,154C 'amqp':34B,55B,91C,113C 'amqp091':3A,40B,86C 'amqp091-go':2A,39B,85C 'attempt':143C 'bodi':10A,47B,71B,103C,135C,149C 'broker':66B,129C 'buffer':11A,48B 'cap':59B,117C 'caus':138C 'ch.header.size':108C 'channel.go':99C 'channel.recvcontent':97C 'client':43B,76B,93C,161C 'compromis':64B,128C 'connection.config.framesize':123C 'content':56B,114C 'correspond':145C 'crash':83B 'cve':17A,28A 'data':150C 'declar':52B,68B,134C 'enorm':70B 'exhaust':6A,156C 'extrem':133C 'fix':166C 'gcjp':23A 'ghsa':21A 'ghsa-r9c8-gcjp-xfwh':20A 'github.com':15A,32A 'github.com/rabbitmq/amqp091-go':14A,31A 'go':4A,25A,35B,41B,42B,87C,90C,140C 'header':57B,115C 'issu':164C 'larg':146C 'make':74B 'malici':62B,126C 'memori':81B,157C 'messag':46B,102C 'negoti':122C 'oom':7A 'packag':36B 'prealloc':44B,100C 'prior':94C 'process':77B,162C 'r9c8':22A 'rabbitmq':1A,37B,65B,84C 'receiv':152C 'resourc':5A 'run':78B 'runtim':141C 'send':131C 'size':51B,72B,136C 'slice':104C 'suppli':110C 'termin':159C 'uint64':107C 'unbound':9A 'use':49B 'valu':109C,124C 'version':168C 'via':8A 'without':58B,116C 'xfwh':24A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-09-16T15:17:50+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"govuln","external_id":"GO-2026-6500","url":"https://pkg.go.dev/vuln/GO-2026-6500","severity":null,"published_at":"2026-10-01T20:23:56+00:00","modified_at":"2026-10-01T20:23:56+00:00","first_seen_at":"2026-10-23T19:13:08+00:00","fetched_at":"2026-10-23T19:13:08+00:00","note":null},{"source":"epss","external_id":"CVE-2026-77410","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-77410","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-77410","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77410","severity":null,"published_at":"2026-09-16T15:17:50+00:00","modified_at":"2026-09-23T18:19:19+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}