CVE-2018-20743

HIGHNVD 7.57.5—

7.5

murmur in Mumble through 1.2.19 before 2018-08-31 mishandles multiple concurrent requests that are persisted in the database, which allows remote attackers to cause a denial of service (daemon hang or crash) via a message flood.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 91.7%
KEV: Not listed

Published

January 25, 2019

Last Modified

November 21, 2024

References (18)

cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2019-07/msg00045.html
cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2019-08/msg00023.html
cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2020-01/msg00058.html
cve@mitrehttps://bugs.debian.org/919249
cve@mitrehttps://github.com/mumble-voip/mumble/issues/3505
cve@mitrehttps://github.com/mumble-voip/mumble/pull/3510
cve@mitrehttps://github.com/mumble-voip/mumble/pull/3512
cve@mitrehttps://lists.debian.org/debian-lts-announce/2019/02/msg00006.html
cve@mitrehttps://www.debian.org/security/2019/dsa-4402
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00045.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00023.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00058.html
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/919249
af854a3a-2127-422b-91ae-364da2661108https://github.com/mumble-voip/mumble/issues/3505
af854a3a-2127-422b-91ae-364da2661108https://github.com/mumble-voip/mumble/pull/3510

Weakness Classification(1)

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

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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.

2026-06-08 14:14 UTCEPSS rescore
2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 22:56 UTCEG score recompute

Frequently asked(5)

What is CVE-2018-20743?

CVE-2018-20743 is a high vulnerability published on January 25, 2019. murmur in Mumble through 1.2.19 before 2018-08-31 mishandles multiple concurrent requests that are persisted in the database, which allows remote attackers to cause a denial of service (daemon hang or crash) via a message flood.

When was CVE-2018-20743 disclosed?

CVE-2018-20743 was first published in the National Vulnerability Database on January 25, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-20743 actively exploited?

CVE-2018-20743 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-20743?

CVE-2018-20743 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2018-20743?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20743, 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.

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CVE-2018-20743

📅 Published

🔄 Last Modified

🔗 References (18)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-20743?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (18)

Frequently asked(5)

Related CVEs(same CWE)