amqp091-go is a Go AMQP 0.9.1 client. From 1.13.0 until 1.14.0, the frame-size mitigation from the prior allocation advisory can be bypassed before connection.tune completes because Connection.maxFrameSize uses zero for both the not-yet-negotiated and negotiated-unlimited states. A malicious or compromised AMQP peer can send a short body-frame header with a large declared payload length, causing ReadFrame and the body-frame parser to allocate attacker-selected memory before the payload is received or the frame's protocol state is rejected. The condition is reachable through public Open even when Config.FrameSize is set to the protocol minimum and can cause severe memory pressure, out-of-memory termination, or loss of the client process before authentication completes. This issue is fixed in version 1.14.0.
CVE-2026-107386
This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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).
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.3
- EG Score
- 6.3MEDIUMlow confidence
- EG Risk
- 28EG Risk 28/100CISA SSVC
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 computedSeverity63% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.5%
- EPSS %ILE
- 40th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 8, 2026
Last Modified
October 9, 2026
Advisory Details (4)
Auto-updated Oct 8, 2026Pre-negotiation frame limit is not enforced to 4KB · Advisory · rabbitmq/amqp091-go · GitHub
https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-w6r9-248c-frg8v1.14.0
Patch available: rabbitmq/amqp091-go v1.14.0
https://github.com/rabbitmq/amqp091-go/releases/tag/v1.14.0Enforce frame size in pre-negotiation state
Patch available: rabbitmq/amqp091-go v1.14.0 (PR #377 merged 2026-08-03)
https://github.com/rabbitmq/amqp091-go/pull/377commit 6723e8cff871 (rabbitmq/amqp091-go)
Patch available: rabbitmq/amqp091-go v1.14.0 (contains commit 6723e8cff871)
https://github.com/rabbitmq/amqp091-go/commit/6723e8cff8710f0a6bf5fb4af375e285052535b3Vendor Advisories for CVE-2026-107386(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| github.com/rabbitmq/amqp091-go | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× 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.
- 2026-10-09 20:06 UTCEPSS rescore
- 2026-10-09 16:35 UTCEG score recompute
- 2026-10-09 15:26 UTCEG score recompute
- 2026-10-08 19:18 UTCEG score recompute
- 2026-10-08 19:05 UTCEG score recompute
- 2026-10-08 19:04 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
10 shownGo:github.com/rabbitmq/amqp091-go
Frequently asked(5)
What is CVE-2026-107386?
When was CVE-2026-107386 disclosed?
Is CVE-2026-107386 actively exploited?
What is the CVSS score of CVE-2026-107386?
How do I remediate CVE-2026-107386?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-107386
Is Your Infrastructure Affected by CVE-2026-107386?
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