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TI-2026-39288 Aliases CVE-2026-54412GHSA-28cw-rpqc-wqqj

MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

LiamBindle MQTT-C versions prior to 1.1.7 contain a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response() function in src/mqtt.c. A remote unauthenticated attacker controlling an MQTT broker, or capable of injecting MQTT traffic into an unencrypted session, can crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0043 37th percentileScored 2026-11-07
Fix Fixed MQTT-C (LiamBindle): 1.1.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LiamBindleMQTT-Cbefore 1.1.71.1.7Patch availableCNA
  • MQTT-C VendorLiamBindle Affected before 1.1.7 Fixed in 1.1.7 Patch available CNA

Remediation

  • Fix · CNA MQTT-C (LiamBindle) Fixed in 1.1.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54412
  2. 2026-10-03 Alias added: GHSA-28cw-rpqc-wqqj
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-11-05 Fix available: LiamBindle/[email protected] · CNA
  5. 2026-11-05 2 new references · CNA

References

Patch 2

Other 4

Sources

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