CVE-2026-77409

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.dispatch in channel.go, confirms.confirm in confirms.go, and Connection.dispatch0 in connection.go synchronously send publisher confirmations, flow-control events, consumer cancellations, returned messages, including NotifyConfirm events and connection block notifications, to application-provided channels. If a listener channel is unbuffered, full, or not drained promptly, the sole reader goroutine blocks and stops processing frames, acknowledgments, deliveries, and heartbeats. Broker-driven event bursts can therefore cause connection stalls, missed heartbeats, deadlocks, and disconnection. This issue is fixed in version 1.13.0.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v1.13.0

Patch available: rabbitmq/amqp091-go v1.13.0

https://github.com/rabbitmq/amqp091-go/releases/tag/v1.13.0
github_commit Patch Available

commit 5b0ccbb8d7bc (rabbitmq/amqp091-go)

Patch available: rabbitmq/amqp091-go v1.13.0 (contains commit 5b0ccbb8d7bc)

https://github.com/rabbitmq/amqp091-go/commit/5b0ccbb8d7bc3dfa18129d9b0f9256d656809494
github_pr Patch Available

Avoid notifications blocking reader.

Patch available: rabbitmq/amqp091-go v1.13.0 (PR #349 merged 2026-06-16)

https://github.com/rabbitmq/amqp091-go/pull/349
github Patch Available

Denial of Service via Synchronous Event Channel Blocking · Advisory · rabbitmq/amqp091-go · GitHub

https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-wxx3-cj7g-w73j

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 15× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 03:02 UTCEG score recompute
  2. 2026-09-21 03:02 UTCVendor advisory
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 15:43 UTCVendor advisory
  5. 2026-09-20 04:25 UTCVendor advisory
  6. 2026-09-19 17:07 UTCEG score recompute
  7. 2026-09-19 17:07 UTCVendor advisory
  8. 2026-09-19 05:50 UTCEG score recompute
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 18:32 UTCEG score recompute
  11. 2026-09-18 18:15 UTCEG score recompute
  12. 2026-09-18 01:18 UTCEG score recompute
  13. 2026-09-16 15:20 UTCEG score recompute
  14. 2026-09-16 14:51 UTCEG score recompute
  15. 2026-09-16 14:50 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-77409?
CVE-2026-77409 is a high vulnerability published on September 16, 2026. RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.dispatch in channel.go, confirms.confirm in confirms.go, and Connection.dispatch0 in connection.go synchronously send publisher confirmations, flow-control events, consumer cancellations, returned messages, including…
When was CVE-2026-77409 disclosed?
CVE-2026-77409 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77409 actively exploited?
CVE-2026-77409 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-77409?
CVE-2026-77409 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-77409?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77409, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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