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TI-2018-09009 Aliases CVE-2018-12550GHSA-5cgw-j2m3-gxhw

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file…

Priority LOW 38CWE-440Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.

Why it matters now

EPSS 0.01353 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse Mosquitto1.0 and later; up to 1.5.5—No fix listedCNA
  • Eclipse Mosquitto VendorEclipse Foundation Affected 1.0 and later; up to 1.5.5 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*1.0 – 1.5.5VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:* Versions 1.0 – 1.5.5 Vulnerable ·Eclipse Foundation

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    The Eclipse Foundation Eclipse Mosquitto unspecified

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2018-09010 Improper authentication in Eclipse MosquittoPriority LOW 38
    • TI-2017-05291 NULL pointer dereference in Eclipse MosquittoPriority LOW 36
    • TI-2018-09005 Improper access control in Eclipse MosquittoPriority LOW 30
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12550
  2. 2026-10-03 Alias added: GHSA-5cgw-j2m3-gxhw

References

Advisory 1

Other 1

  • TI-2024-09749 Eclipse Mosquito: Heap Buffer Overflow in my_subscribe_callback CVSS 4.0HIGH 7.2
  • TI-2018-09002 Reachable assertion in Eclipse Mosquitto CVSS 3.0HIGH 7.5
  • TI-2023-12912 The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that… CVSS 3.1HIGH 7.5
  • TI-2017-05287 Uncontrolled resource consumption in Eclipse Mosquitto CVSS 3.0HIGH 7.5
  • TI-2023-05183 Unconditionally adding an event to the epoll causes excessive CPU consumption CVSS 3.1HIGH 7.5
  • TI-2018-09010 Improper authentication in Eclipse Mosquitto CVSS 3.0HIGH 8.1
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences