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CVE-2026-49826

Concourse login flow has an open redirect issue

N/A
Published: August 14, 2026 at 04:25 PM UTC
Updated: September 18, 2026 at 08:19 PM UTC
1 product affected across 1 vendorConcourse

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Severity
N/A
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Concourse· Concourse
60%
v < 8.2.3
Affected range stops below 8.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/concourse/concourse/security/advisories/GHSA-8w27-c4vc-88q9
x_refsource_MISC
Source: cverecord
https://github.com/concourse/concourse/commit/ac60be5f0435b6592f5a4fcc089050d72ad2452c
x_refsource_MISC
Source: cverecord
https://github.com/concourse/concourse/releases/tag/v8.2.3

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-601

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