CVE-2026-44236

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.frame_max value during amqp_login(), and rabbitmq-c accepts the value in amqp_login_inner() in librabbitmq/amqp_socket.c. amqp_tune_connection() in librabbitmq/amqp_connection.c uses frame_max to reallocate the outbound buffer without enforcing AMQP_FRAME_MIN_SIZE. Immediate serialization of connection.tune-ok through amqp_frame_to_bytes() writes beyond the undersized heap allocation, causing memory corruption and likely denial of service. An on-path attacker can also trigger the flaw against plaintext AMQP traffic. Code execution is theoretically possible but was not demonstrated. This issue is fixed in version 0.16.0.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

rabbitmq-c v0.16.0

Patch available: alanxz/rabbitmq-c v0.16.0

https://github.com/alanxz/rabbitmq-c/releases/tag/v0.16.0
github_commit Patch Available

commit 4777d0b5c58c (alanxz/rabbitmq-c)

Patch available: alanxz/rabbitmq-c v0.16.0 (contains commit 4777d0b5c58c)

https://github.com/alanxz/rabbitmq-c/commit/4777d0b5c58cb02966a04a85832436bd66ed5d1f
github_pr Patch Available

Release v0.16.0

Patch available: alanxz/rabbitmq-c v0.17.0 (PR #879 merged 2026-06-09)

https://github.com/alanxz/rabbitmq-c/pull/879
github Patch Available🟡 PoC Available

Heap buffer overflow in AMQP login handshake via undersized connection.tune.frame_max · Advisory · alanxz/rabbitmq-c · GitHub

https://github.com/alanxz/rabbitmq-c/security/advisories/GHSA-jh48-qjf5-fx5v

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibrabbitmq4 (0.15.0-1ubuntu0.26.04.1) @ resolute2026-09-20ubuntu
ubuntulibrabbitmq4 (0.15.0-1ubuntu0.26.04.2) @ resolute2026-09-20ubuntu

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.

Weakness Classification(1)

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

All Vendor Advisories

(2)

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 02:31 UTCEG score recompute
  2. 2026-09-20 20:15 UTCEPSS rescore
  3. 2026-09-20 15:04 UTCVendor advisory
  4. 2026-09-20 03:38 UTCVendor advisory
  5. 2026-09-19 16:11 UTCEG score recompute
  6. 2026-09-19 16:11 UTCVendor advisory
  7. 2026-09-19 04:44 UTCEG score recompute
  8. 2026-09-19 04:44 UTCVendor advisory
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 17:18 UTCVendor advisory
  11. 2026-09-18 05:52 UTCVendor advisory
  12. 2026-09-17 18:26 UTCEG score recompute
  13. 2026-09-17 18:26 UTCVendor advisory
  14. 2026-09-17 17:20 UTCEG score recompute
  15. 2026-09-17 17:19 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Same vendor

1 shown

ubuntu:USN-8437-1

Frequently asked(5)

What is CVE-2026-44236?
CVE-2026-44236 is a high vulnerability published on September 17, 2026. rabbitmq-c is a C-language AMQP client library for RabbitMQ. Prior to 0.16.0, a malicious AMQP server can send an undersized connection.tune.framemax value during amqplogin(), and rabbitmq-c accepts the value in amqplogininner() in librabbitmq/amqpsocket.c. amqptuneconnection() in…
When was CVE-2026-44236 disclosed?
CVE-2026-44236 was first published in the National Vulnerability Database on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44236 actively exploited?
CVE-2026-44236 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 59.7% of all scored CVEs.
What is the CVSS score of CVE-2026-44236?
CVE-2026-44236 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-44236?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44236, 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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