CVE-2015-6816

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

9.8 CriticalFix available

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.56%Up 2.2 points since Feb 4, 2022

What each source reports

NVD Score used 9.8

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: CVE-2015-6816
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-287
Updated: 2026-11-02

CVE List No score

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: CVE-2015-6816
Updated: 2026-11-02

EUVDEUVD-2015-6753 No score

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: EUVD-2015-6753
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mgrr-7c88-34fm 9.8

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: GHSA-mgrr-7c88-34fm
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-287
Updated: 2026-11-02

OSV 9.8

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: CVE-2015-6816
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2015-6816 9.8

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: DEBIAN-CVE-2015-6816
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-6816 9.8

ganglia-web before 3.7.1 allows remote attackers to bypass authentication.

Record: UBUNTU-CVE-2015-6816
CVSS 3.0: 9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVMGASA-2015-0375 No score

Updated ganglia-web packages fix CVE-2015-6816

An issue with the use of unserialize() in ganglia-web allows authentication to be bypassed (CVE-2015-6816).

Record: MGASA-2015-0375
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`ganglia` Debian:12	before 3.6.0-1	3.6.0-1
`ganglia` Debian:14	before 3.6.0-1, plus listed versions 3.1.0-13.1.1-13.1.1-23.1.1-33.1.2-1 Show 12 moreShow less 3.1.2-23.1.2-2.13.1.2-33.1.2-3.13.1.7-13.1.7-1+squeeze13.1.7-23.1.7-2.13.3.5-13.3.5-23.3.8-13.3.8-1+nmu1	3.6.0-1
`ganglia-web` Debian:12	before 3.7.5+debian-1, plus listed versions 3.5.2-13.5.2-23.5.8-13.5.8-23.5.8-3 Show 6 moreShow less 3.5.8-3.13.5.8-43.6.1-13.6.1-23.6.1-33.6.1-3.1	3.7.5+debian-1
`ganglia-web` Debian:13	before 3.7.5+debian-1, plus listed versions 3.5.2-13.5.2-23.5.8-13.5.8-23.5.8-3 Show 6 moreShow less 3.5.8-3.13.5.8-43.6.1-13.6.1-23.6.1-33.6.1-3.1	3.7.5+debian-1
`ganglia-web` Debian:14	before 3.7.5+debian-1, plus listed versions 3.5.2-13.5.2-23.5.8-13.5.8-23.5.8-3 Show 6 moreShow less 3.5.8-3.13.5.8-43.6.1-13.6.1-23.6.1-33.6.1-3.1	3.7.5+debian-1
`ganglia-web` Mageia:4	before 3.5.10-3.1.mga4	3.5.10-3.1.mga4
`ganglia-web` Mageia:5	before 3.6.2-4.2.mga5	3.6.2-4.2.mga5
`ganglia-web` Ubuntu:16.04:LTS	All versions, plus listed versions 3.6.1-13.6.1-1ubuntu13.6.1-1ubuntu1.1	None known
`ganglia-web` Ubuntu:18.04:LTS	All versions, plus listed versions 3.6.1-3	None known
`ganglia-web` Ubuntu:20.04:LTS	All versions, plus listed versions 3.6.1-3	None known
`ganglia` Ubuntu:26.10	All versions, plus listed versions 3.7.2-7ubuntu1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-6816 is a critical vulnerability (CVSS 9.8) in Ganglia Ganglia-web, published September 17, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.56%, the 89th percentile. Fixed in ganglia 3.6.0-1.

References

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