CVE-2026-126308

Coder 2.38.0 before 2.38.2 Session Token Leak via Sub-Agent External Apps

The web dashboard in Coder 2.24.0 before 2.29.23, 2.30.0 before 2.34.14, 2.35.0 before 2.36.9, 2.37.0 before 2.37.6, and 2.38.0 before 2.38.2 replaces the $SESSION_TOKEN placeholder in external app URLs with a full-access API key without checking whether the app belongs to a sub-agent. Code running in a workspace can register a disguised sub-agent app with a custom protocol URL, so the owner's click sends their API key to an attacker-chosen destination.

CVSS 4.0 · 8.7 High EPSS n/a KEV · Not listed

Vendors

Coder

Products

Coder

CVE-2026-126403

Coder 2.38.0 before 2.38.4 Authorization Bypass via External Agent Credentials Endpoint

Coder 2.26.0 before 2.29.24, 2.30.0 before 2.34.16, 2.35.0 before 2.36.11, 2.37.0 before 2.37.8, and 2.38.0 before 2.38.4 contains an improper authorization flaw in the external agent credentials endpoint, which returns the workspace agent token to users with only workspace read access rather than ssh permission. Authenticated users with roles such as Template Admin or Organization Admin can use the token to read the owner's private Git SSH key and Git provider OAuth tokens, and impersonate the agent to receive the owner's sessions.

CVSS 4.0 · 8.5 High EPSS n/a KEV · Not listed

Vendors

Coder

Products

Coder

CVE-2026-126404

Coder from 2.38.0 before 2.38.4 Privilege Escalation via API Key Creation

Coder 2.28.0 before 2.29.24, 2.30.0 before 2.34.16, 2.35.0 before 2.36.11, 2.37.0 before 2.37.8, and 2.38.0 before 2.38.4 does not restrict new API keys to the creating token's scopes, allow list, or expiry. A scoped API key or OAuth2 token holding key-creation permission can call POST /api/v2/users/{user}/keys/tokens to mint longer-lived coder:all keys, gaining the user's full privileges.

CVSS 4.0 · 7.6 High EPSS n/a KEV · Not listed

Vendors

Coder

Products

Coder

CVE-2026-126405

Coder from 2.38.0 before 2.38.4 Memory Exhaustion DoS via Web Push

Coder 2.21.0 before 2.29.24, 2.30.0 before 2.34.16, 2.35.0 before 2.36.11, 2.37.0 before 2.37.8, and 2.38.0 before 2.38.4 reads Web Push endpoint responses in webpushSend with io.ReadAll, without a size limit or client timeout. Any authenticated user can register a subscription via POST /api/v2/users/{user}/webpush/subscription pointing to a server returning an endless body, exhausting coderd memory and crashing the API, dashboard, and workspace connections.

CVSS 4.0 · 7.1 High EPSS n/a KEV · Not listed

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Coder

Products

Coder

CVE-2024-58398

Coder 2.3.1 before 2.16.1 Open Redirect via Login Page redirect Parameter

Coder 2.3.1 before 2.14.4, 2.15.x before 2.15.3, and 2.16.0 before 2.16.1 contains an open redirect vulnerability in the login page because the redirect query parameter is improperly sanitized. Attackers can craft a Coder login URL that, when clicked by a logged-in user, redirects the victim to an attacker-controlled website for phishing.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Coder

Products

Coder

CVE-2026-121967

Coder before 2.29.22, 2.34.13, 2.35.10, 2.36.8, 2.37.5, and 2.38.1 AI Gateway Path Traversal

Coder 2.28.0 before 2.29.22, 2.30.0 before 2.34.13, 2.35.0 before 2.35.10, 2.36.0 before 2.36.8, 2.37.0 before 2.37.5, and 2.38.0 before 2.38.1 contains a path traversal vulnerability in the AI Gateway passthrough router, which forwards percent-encoded dot segments upstream without rejecting them. Authenticated users can send paths such as %2e%2e or ..%2F under allowlisted prefixes to reach unintended provider endpoints using the deployment's centrally managed provider key.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-111932

Coder before 2.34.2 Stored HTML Injection via Appearance Settings

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a stored HTML injection vulnerability because the ApplicationName and LogoURL appearance settings are rendered into HTML output without sufficient escaping. Attackers with the Owner role can store HTML markup in these settings that renders in the Coder dashboard and in SMTP notification emails sent to other deployment users.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-118687

Coder before 2.29.21, 2.34.12, 2.35.9, 2.36.7, and 2.37.4 Missing Audience Validation in GCP Instance-Identity Authentication

Coder before 2.29.21, 2.30.0 before 2.34.12, 2.35.0 before 2.35.9, 2.36.0 before 2.36.7, and 2.37.0 before 2.37.4 does not validate the audience claim of GCE instance-identity JWTs at the POST /api/v2/workspaceagents/google-instance-identity endpoint. Attackers who obtain an unexpired format=full identity token minted for another relying party can replay it to obtain that workspace agent's session token, which remains valid until the workspace's next build.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-111927

Coder before 2.35.4 Credential Theft via Workspace Proxy Hostname Prefix Match

Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyByHostname whose SIMILAR TO pattern performs a prefix match, so any domain that is a string prefix of a workspace-proxy access URL is trusted as a proxy. Attackers owning such a domain can lure an authenticated victim to a crafted /api/v2/applications/auth-redirect link, capture the redirected application_connect API key, and replay it to access the victim's workspace apps.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-111930

Coder from 2.26.0 before 2.34.8 Information Disclosure via Workspace ACL Endpoint

Coder from 2.26.0 before 2.34.8 contains an incorrect authorization flaw in the GET /api/v2/workspaces/{id}/acl endpoint, which checks only workspace read access and then fetches group members using an elevated system context. Authenticated users granted workspace use access can query the endpoint to harvest group members' emails, login types, status, and last-seen and creation timestamps.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-111934

Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header

Coder before 2.34.7 contains an IP spoofing vulnerability in the ExtractRealIPAddress middleware that trusts the leftmost, client-supplied X-Forwarded-For value instead of the client IP appended by a reverse proxy. Attackers can send forged X-Forwarded-For values through appending proxies to bypass per-IP rate limits on login, one-time passcode, and password validation endpoints, enabling brute-force attacks, and to falsify IP addresses recorded in audit logs.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-111929

Coder 2.30.0 before 2.34.8 Cross-Organization File Disclosure via DownloadFile RPC

Coder from 2.30.0 before 2.34.8 contains an authorization bypass vulnerability in the provisioner daemon DownloadFile gRPC handler that allows authenticated provisioner daemons to download other organizations' cached Terraform module archives. Attackers with an org-scoped provisioner key and a known file UUID can retrieve module source code exposing infrastructure topology or embedded secrets.

CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-111933

Coder before 2.34.2 User Enumeration via Login Placeholder Hash

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string "hunter2" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password "hunter2" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-111928

Coder 2.0.0 before 2.34.8 Authorization Bypass via User-Level ACL in RBAC Policy

Coder from 2.0.0 before 2.34.8 contains an incorrect authorization vulnerability in the acl_allow rule of coderd/rbac/policy.rego, which does not verify organization membership for per-user ACL entries, and organization member removal does not scrub those entries. Authenticated users removed from an organization can keep accessing previously granted org-scoped resources such as templates and workspaces via the API.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2025-71435

Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token

Coder before 2.23.0 contains a session expiration bypass vulnerability that allows authenticated users to retain access after OIDC token expiry when no refresh token is issued. Users can keep their APIKey cookie active through regular use, extending it every 24 hours to access Coder indefinitely after losing OIDC authorization.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-111931

Coder 2.0.0 before 2.34.8 Open Redirect via Workspace App Proxy

Coder from 2.0.0 before 2.34.8 contains an open redirect vulnerability in handleAPIKeySmuggling that allows attackers to redirect users externally via unsanitized r.URL.Path values. Attackers can craft links on trusted workspace app subdomains with paths beginning with double slashes, which become scheme-relative redirects to attacker sites for phishing.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

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Coder

Products

Coder

CVE-2026-111926

Coder from 2.10.0 before 2.34.8 Information Disclosure via Agent /debug/manifest

Coder from 2.10.0 before 2.34.8 has an unauthenticated agent debug HTTP server on 127.0.0.1:2113 whose /debug/manifest handler returns the full agent manifest, including template-provided environment variable values. A lower-privileged Unix user or process in the same workspace can query this endpoint to read credentials such as cloud keys or registry tokens.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-63443

Coder: Workspace agent API insecure redirect handling allowed cross-agent file read and write

Coder allows organizations to provision remote development environments via Terraform. Prior to 2.29.19, 2.32.9, 2.33.10, and 2.34.4, agentConn.apiClient() follows redirects while its custom transport accepts the host from the redirected request URL when the port is the workspace agent HTTP API port 4. An authenticated user who controls a modified workspace agent and knows another online agent's UUID can derive the victim's tailnet address and redirect control-plane requests to that agent. HTTP 301, 302, and 303 redirects can redirect read requests, while HTTP 307 and 308 preserve replayable write and process-start requests. The redirected workspace agent file APIs can read or write files as the victim workspace user, and affected versions exposing the workspace agent process API can execute commands after a redirected file write, crossing workspace and tenant boundaries. This issue is fixed in versions 2.29.19, 2.32.9, 2.33.10, and 2.34.4.

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-55076

Coder's OIDC email_verified type coercion bypass enables account takeover via unverified email linking

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's OIDC callback checked `email_verified` with a direct Go `bool` type assertion. When an IdP returned the claim as a non-boolean (for example the string `"false"`) or omitted it, the assertion failed open and the email was treated as verified. Combined with an unconditional email-based account fallback, this enabled account takeover. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 coerces `email_verified` across bool, string and numeric types (fail-closed) and blocks the email fallback when the matched user already has a different linked IdP subject. As a workaround, ensure the IdP returns `email_verified` as a native JSON boolean. The email-fallback linking issue has no configuration workaround; upgrading is required.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

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Coder

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Coder

CVE-2026-55437

Coder vulnerable to stored HTML injection via workspace agent logs in AgentLogLine component

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2, the `AgentLogLine` dashboard component instantiated `ansi-to-html` without `escapeXML: true` and inserted the result via `dangerouslySetInnerHTML` so HTML embedded in workspace agent log lines was rendered as live markup. Server-side sanitization did not neutralize HTML metacharacters. Exploitation requires a victim to view attacker-controlled agent logs in the dashboard. The fix in versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2 enables `escapeXML: true` so HTML metacharacters are escaped before DOM insertion. No known workarounds are available.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Coder

Products

Coder