CVE-2026-107386

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-95161 (ENISA EUVD) · GHSA-w6r9-248c-frg8 (GitHub Security Advisories)Source: ENISA EUVD

6.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 8, 2026

Last Modified

October 9, 2026

Advisory Details (4)

Auto-updated Oct 8, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Pre-negotiation frame limit is not enforced to 4KB · Advisory · rabbitmq/amqp091-go · GitHub

https://github.com/rabbitmq/amqp091-go/security/advisories/GHSA-w6r9-248c-frg8
GitHub release Patch Available

v1.14.0

Patch available: rabbitmq/amqp091-go v1.14.0

https://github.com/rabbitmq/amqp091-go/releases/tag/v1.14.0
GitHub pull request Patch Available

Enforce 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/377
GitHub commit Patch Available

commit 6723e8cff871 (rabbitmq/amqp091-go)

Patch available: rabbitmq/amqp091-go v1.14.0 (contains commit 6723e8cff871)

https://github.com/rabbitmq/amqp091-go/commit/6723e8cff8710f0a6bf5fb4af375e285052535b3

Vendor 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.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopentelemetry-collector-contrib-main-0.162.0-0.2.hum12026-10-09redhat
gogithub.com/rabbitmq/amqp091-go @ 1.14.0 (fixes < 1.14.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-rabbitmq-amqp091-go1.10.0-1 ... 1.9.0-1 (9 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-rabbitmq-amqp091-go1.10.0-1, 1.11.0-1, 1.12.0-1, 1.14.0-1, 1.15.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-rabbitmq-amqp091-go1.10.0-1, 1.11.0-1, 1.12.0-1
  • every version up to 1.14.0-1: fixed in 1.14.0-1
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/rabbitmq/amqp091-go—
  • every version up to 1.14.0: fixed in 1.14.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-w6r9-248c-frg8 · GitHub severity MODERATE
  3. 2026-11-01 08:00 UTCEG score recompute
  4. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-29 14:56 UTCEG score recompute
  8. 2026-10-29 14:56 UTCVendor advisory
  9. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-25 14:54 UTCEG score recompute
  14. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  16. 2026-10-23 08:43 UTCEG score recompute
  17. 2026-10-23 08:43 UTCVendor advisory
  18. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  20. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-18 05:07 UTCEG score recompute
  24. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 19 more
  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-12 16:38 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-10-11 20:15 UTCVendor advisory
  7. 2026-10-11 20:14 UTCEG score recompute
  8. 2026-10-11 18:26 UTCEG score recompute
  9. 2026-10-11 15:00 UTCEG score recompute
  10. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-10 18:24 UTCEG score recompute
  13. 2026-10-10 18:24 UTCVendor advisory
  14. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-09 16:35 UTCEG score recompute
  16. 2026-10-09 15:26 UTCEG score recompute
  17. 2026-10-08 19:18 UTCEG score recompute
  18. 2026-10-08 19:05 UTCEG score recomputeFirst assessed: 6.3 MEDIUM
  19. 2026-10-08 19:04 UTCMITRE cvelistV5first tracked

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redhat:RHSA-2026:80217

Frequently asked(5)

What is CVE-2026-107386?
CVE-2026-107386 is a medium-severity vulnerability; its CVE record was published on October 8, 2026. 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…
When was the CVE record for CVE-2026-107386 published?
The CVE record for CVE-2026-107386 was published on October 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 9, 2026; the record at its source may have been updated since.
Is CVE-2026-107386 actively exploited?
CVE-2026-107386 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107386?
CVE-2026-107386 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107386?
A fix for CVE-2026-107386 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107386 are linked in the Vendor Advisories panel on this page.

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