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CVE-2026-8741

A vulnerability has been found in EMQX up to 6.2.0. This affects an unknown function of the file apps/emqx/src/emqx_persistent_session_ds.erl of the component QoS 2 PUBLISH Packet Handler. Such manipulation leads to race condition. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2b4fab52f5c69bdeb51fb6eadb65a90361b8b298262292145d064eab0815468e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":2.1,"vectorString":"AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":3.1,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":3.1,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:emqx:emqx:*:*:*:*:*:*:*:*"],"modules":["QoS 2 PUBLISH Packet Handler"],"product":"EMQX","vendor":"n/a","versions":[{"status":"affected","version":"6.0"},{"status":"affected","version":"6.1"},{"status":"affected","version":"6.2.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":2.1,"vectorString":"AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":3.1,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":3.1,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-362","description":"Race Condition","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://github.com/Pathfind-tama/Report_EMQX_MQTT"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/Pathfind-tama/Report_EMQX_MQTT/blob/main/MQTT%20QoS%202%20Message%20Duplication%20in%20Persistent%20Sessions.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/references/4
{"name":"Submit #809931 | EMQX EMQX Broker EMQX 6.1.0 (confirmed) Race Condition","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/809931"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/references/2
{"name":"VDB-364329 | EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition","tags":["vdb-entry"],"url":"https://vuldb.com/vuln/364329"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/references/0
{"name":"VDB-364329 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/364329/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:678f4bf7efbdfaf8092eb6a970f75b47d6d402a2f3dd085ee7b153da4d61ff48 · sha256:f2748f9505a7f1ee… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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