CVE-2026-63443High· 8.3▾ TwilightCoder 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 45.7 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
0.4% → 0.8%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/coder/coder/v2 >= 2.34.0, < 2.34.4github.com/coder/coder/v2 >= 2.33.0, < 2.33.10github.com/coder/coder/v2 >= 2.30.0, < 2.32.9github.com/coder/coder/v2 >= 2.27.0, < 2.29.19Patched in:
github.com/coder/coder/v2 2.34.4github.com/coder/coder/v2 2.33.10github.com/coder/coder/v2 2.32.9github.com/coder/coder/v2 2.29.19Connected by shared product, vendor, weakness, or advisory.
GHSA-qrwj-vh9x-gw5vHigh· 8.3Coder's workspace agent API insecure redirect handling allowed cross-agent file read and write
CVE-2024-58398Medium· 4.3Coder 2.3.1 before 2.16.1 Open Redirect via Login Page redirect Parameter
CVE-2025-71435Medium· 4.2Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token
CVE-2026-111932Low· 3.4Coder before 2.34.2 Stored HTML Injection via Appearance Settings
CVE-2026-111933Low· 3.7Coder before 2.34.2 User Enumeration via Login Placeholder Hash
GO-2026-5923NoneCoder's workspace agent API insecure redirect handling allowed cross-agent file read and write in github.com/coder/coder