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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
concourse concourse affected
Version Status Constraints
< 8.2.3 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

No data.

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.

References
Link Providers
https://github.com/concourse/concourse/commit/ac60be5f0435b6592f5a4fcc089050d72ad2452c cve-icon cve-icon
https://github.com/concourse/concourse/releases/tag/v8.2.3 cve-icon cve-icon
https://github.com/concourse/concourse/security/advisories/GHSA-8w27-c4vc-88q9 cve-icon cve-icon
History

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

Sign in to view the affected projects.

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: 2026-08-14T17:30:12Z

Weaknesses