{"schemaVersion":3,"id":"CVE-2026-77408","aliases":["DEBIAN-CVE-2026-77408","GHSA-j497-x9hr-x34x","GO-2026-6498"],"status":"published","duplicateOf":null,"title":null,"description":"RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, the writeShortstr function in write.go casts the byte length of AMQP shortstr property values to uint8 without first rejecting values longer than 255 bytes. An application that accepts an oversized CorrelationId, ReplyTo, MessageId, Expiration, UserId, AppId, ContentType, ContentEncoding, or Type value can therefore serialize a wrapped length and only a truncated prefix, while reporting no error. The resulting silent metadata corruption can break request and reply correlation, routing, tracing, and downstream message processing. This issue is fixed in version 1.13.0.","dates":{"published":"2026-09-16T14:30:03.731Z","modified":"2026-09-16T15:01:27.706Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":9.1,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:L","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · 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Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"debian","product":"golang-github-rabbitmq-amqp091-go","name":"golang-github-rabbitmq-amqp091-go","label":"golang-github-rabbitmq-amqp091-go","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/golang-github-rabbitmq-amqp091-go","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.14.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1.14.0-1","eol":null,"hubHref":null},{"vendor":"github.com/rabbitmq","product":"amqp091-go","name":"github.com/rabbitmq/amqp091-go","label":"amqp091-go","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/rabbitmq/amqp091-go","purlType":"golang","versions":[{"text":"< 1.13.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.13.0","eol":null,"hubHref":null},{"vendor":"rabbitmq","product":"amqp091-go","name":"amqp091-go","label":"amqp091-go","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.13.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.13.0","eol":null,"hubHref":"/vendor/rabbitmq/amqp091-go"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-j497-x9hr-x34x","label":"github.com/rabbitmq/amqp091-go/security/advisories/GHSA-j497-x9hr-x34x","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Advisory"]},{"url":"https://github.com/rabbitmq/amqp091-go/pull/354","label":"github.com/rabbitmq/amqp091-go/pull/354","hostname":"github.com","tags":["X Refsource MISC","WEB","FIX"]},{"url":"https://github.com/rabbitmq/amqp091-go/commit/6959423aa2784a1971e399175dfb2065dea0f3b0","label":"github.com/rabbitmq/amqp091-go/commit/6959423aa2784a1971e399175dfb2065dea0f3b0","hostname":"github.com","tags":["X Refsource MISC","WEB","FIX"]},{"url":"https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0","label":"github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-77408","label":"security-tracker.debian.org/tracker/CVE-2026-77408","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77408","label":"nvd.nist.gov/vuln/detail/CVE-2026-77408","hostname":"nvd.nist.gov","tags":["Advisory","Oval"]},{"url":"https://github.com/rabbitmq/amqp091-go","label":"github.com/rabbitmq/amqp091-go","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-16T14:30:03.731Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-16T15:01:27.706Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T22:10:28.498Z","stale":false,"partial":false}}