Concourse is a container-based automation system written in Go. Prior to version 8.2.3, an attacker is able to craft and send a user a URL that will redirect the user from the Concourse web server to any other site. This could be used in a phishing attack to steal user's credentials. This has been fixed in 8.2.3. No known workarounds are available.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-8w27-c4vc-88q9 Concourse login flow has an open redirect issue
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 17 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Concourse
Concourse concourse
Vendors & Products Concourse
Concourse concourse

Fri, 14 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description Concourse is a container-based automation system written in Go. Prior to version 8.2.3, an attacker is able to craft and send a user a URL that will redirect the user from the Concourse web server to any other site. This could be used in a phishing attack to steal user's credentials. This has been fixed in 8.2.3. No known workarounds are available.
Title Concourse login flow has an open redirect issue
Weaknesses CWE-601
References
Metrics cvssV4_0

{'score': 0, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-14T18:06:17.054Z

Reserved: 2026-06-01T18:50:36.055Z

Link: CVE-2026-49826

cve-icon Vulnrichment

Updated: 2026-08-14T17:41:37.738Z

cve-icon NVD

Status : Received

Published: 2026-08-14T17:18:27.007

Modified: 2026-08-14T18:17:35.560

Link: CVE-2026-49826

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T11:01:02Z

Weaknesses