CVE-2026-111927: high-severity vulnerability in coder
Coder before 2.35.4 Credential Theft via Workspace Proxy Hostname Prefix Match
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.2%
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/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Affected products
coder · coderRelated CVEs — coder
In the same product, most dangerous first.
CVE-2026-44454HIGHCoder vulnerable to workspace auto-creation via crafted URL parameters without user consentEPSS 2.6%CVE-2024-27918HIGHCoder's OIDC authentication allows email with partially matching domain to registerEPSS 1.0%CVE-2026-63443HIGHCoder: Workspace agent API insecure redirect handling allowed cross-agent file read and writeEPSS 0.8%CVE-2026-55077HIGHCoder: User-admin role can reset owner account passwordEPSS 0.6%CVE-2026-55079MEDIUMCoder's unbounded memory allocation in provisioner file upload allows authenticated denial of serviceEPSS 0.6%CVE-2026-55076HIGHCoder's OIDC email_verified type coercion bypass enables account takeover via unverified email linkingEPSS 0.6%