OS Command Injection in github.com/coder/coder/v2 (CVE-2026-44454)
Summary
OS command injection in github.com/coder/coder/v2 (CVE-2026-44454). Confidential information can be exposed externally. Exploitable via dotfiles. Mitigation: upgrade to 2.30.2 or later.
Original description
The description as published by the source.
Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7 and 2.30.2, the dotfiles registry module passed unsanitized user input to shell commands, allowing arbitrary code execution inside a provisioned workspace. Any user who supplied a crafted dotfiles_uri value (for example, one containing shell command substitution such as $(...)) could achieve command execution in their own workspace. The Create Workspace page's mode=auto deep links amplified this into a one-click attack: an attacker could craft a URL that prefilled param.dotfiles_uri and silently provisioned a workspace with the attacker-controlled value, with no explicit user confirmation. In versions 2.29.7 and 2.30.2, input validation was added to the dotfiles module to reject URIs and usernames containing special characters, and the unsafe eval/sh -c usage was removed. This eliminated the command injection at its source.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-44454 has been found in github.com/coder/coder/v2.
Attackers can target a specific entry point like dotfiles over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade github.com/coder/coder/v2 to 2.30.2 or later.
If unsure, ask your IT team or search "github.com/coder/coder/v2 CVE-2026-44454" on the vendor's site.
CVE-2026-44454 (github.com/coder/coder/v2) — CWE-78 / CVSS v3 8.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: dotfiles / dotfiles_uri / param.dotfiles_uri / eval
Patched: 2.30.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
OS command injection (CWE-78) exists in github.com/coder/coder/v2. Attackers reach the vulnerable code path via dotfiles without authentication.
Check the vendor advisory for the affected versions of github.com/coder/coder/v2. Attack surface: dotfiles / dotfiles_uri / param.dotfiles_uri / eval.
Severity: High (CVSS 8.1/10). Confidential information can be exposed externally.
Update to 2.30.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'github.com/coder/coder/v2' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/coder/coder/v2' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/coder/coder/v2を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/coder/coder/v2 to 2.30.2ステージング環境で 2.30.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- patch github.com
- patch github.com
- patch github.com
- web github.com
- web github.com
- web github.com