7.7

CVE-2026-55431

Coder's session token leaked to arbitrary hosts via `coder open app` for external workspace apps

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `coder open app` opens external workspace-app URLs without validating the scheme or host. When an external app URL contains the `$SESSION_TOKEN` placeholder the CLI replaces it with the user's real session token before handing the URL to the OS open handler. Practical exploitation requires the victim to run `coder open app` against a workspace whose external app definition the attacker controls. Only a malicious template author can control external app URLs. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 applies a URL-scheme allowlist in the CLI and limits `$SESSION_TOKEN` substitution to trusted destinations like the web frontend. As a workaround, avoid running `coder open app` for untrusted workspaces.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Coder ≫ Coder SwPlatformgo Version < 2.29.17
Coder ≫ Coder SwPlatformgo Version >= 2.30.0 < 2.32.7
Coder ≫ Coder SwPlatformgo Version >= 2.33.0 < 2.33.8
Coder ≫ Coder SwPlatformgo Version >= 2.34.0 < 2.34.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.081
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
security-advisories@github.com 7.7 1.3 5.8
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE-522 Insufficiently Protected Credentials

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

https://github.com/coder/coder/releases/tag/v2.32.7
Release Notes
https://github.com/coder/coder/releases/tag/v2.33.8
Release Notes
https://github.com/coder/coder/releases/tag/v2.34.2
Release Notes
https://github.com/coder/coder/releases/tag/v2.29.17
Release Notes
https://github.com/coder/coder/security/advisories/GHSA-v54h-cp2w-9x4g
Patch
Vendor Advisory
https://github.com/coder/coder/pull/26146
Patch
Issue Tracking