---
id: CVE-2020-26294
aliases:
  - GHSA-gv2h-gf8m-r68j
  - GO-2022-0838
title: Exposure of server configuration in github.com/go-vela/server
summary: Exposure of server configuration in github.com/go-vela/server
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'
vendor: go-vela
product: github.com/go-vela/compiler
ecosystem: go
affected:
  - github.com/go-vela/compiler < 0.6.1
patched:
  - github.com/go-vela/compiler 0.6.1
published: '2022-02-15'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-gv2h-gf8m-r68j'
references:
  - url: >-
      https://github.com/go-vela/compiler/security/advisories/GHSA-gv2h-gf8m-r68j
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2020-26294'
  - url: >-
      https://github.com/go-vela/compiler/commit/f1ace5f8a05c95c4d02264556e38a959ee2d9bda
  - url: >-
      https://github.com/helm/helm/blob/6297c021cbda1483d8c08a8ec6f4a99e38be7302/pkg/engine/funcs.go#L46-L47
  - url: 'https://pkg.go.dev/github.com/go-vela/compiler/compiler'
tags:
  - osv
  - go
epss: 0.01777
epssPercentile: 0.77234
ingestedAt: '2026-07-09T18:56:36.543Z'
---

## Overview

### Impact
_What kind of vulnerability is it? Who is impacted?_

* The ability to expose configuration set in the [Vela server](https://github.com/go-vela/server) via [pipeline template functionality](https://go-vela.github.io/docs/templates/overview/).
* It impacts all users of Vela.


Sample of template exposing server configuration [using Sprig's `env` function](http://masterminds.github.io/sprig/os.html):

```yaml
metadata:
  template: true

steps:
  - name: sample
    image: alpine:latest
    commands:
      # OAuth client ID for Vela <-> GitHub communication
      - echo {{ env "VELA_SOURCE_CLIENT" }}
      # secret used for server <-> worker communication
      - echo {{ env "VELA_SECRET" }}
```

### Patches
_Has the problem been patched? What versions should users upgrade to?_

* Upgrade to `0.6.1`

#### Additional Recommended Action(s)

* Rotate all secrets

### Workarounds
_Is there a way for users to fix or remediate the vulnerability without upgrading?_

* No

### For more information

If you have any questions or comments about this advisory:

* Email us at [vela@target.com](mailto:vela@target.com)

## Affected packages

- `github.com/go-vela/compiler < 0.6.1`

## Remediation

Upgrade to a patched release:

- `github.com/go-vela/compiler 0.6.1`