Answer in brief
CVE-2026-49826 records a Low severity (CVSS 0.0) vulnerability in Concourse login flow has an open redirect issue. The current sources do not mark it as known exploited. The current feed maps concourse/concourse (generic), github.com/concourse/concourse (go), github.com/concourse/concourse (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 0.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps concourse/concourse (generic), github.com/concourse/concourse (go), github.com/concourse/concourse (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| concourse/concoursegeneric | <8.2.3 | 8.2.3 |
| github.com/concourse/concoursego | <1.6.1-0.20260526150512-ac60be5f0435 | 1.6.1-0.20260526150512-ac60be5f0435 |
| github.com/concourse/concoursego | >=0 <1.6.1-0.20260526150512-ac60be5f0435 | 1.6.1-0.20260526150512-ac60be5f0435 |
Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 1, 2026
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.
Quoted source text, attributed separately from HOL analysis.