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CVE-2026-111927— Coder before 2.35.4 Credential Theft via Workspace Proxy Hostname Prefix Match

Quick assessment

Affected
coder coder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Coder 2.29.20 之前的版本、2.33.0 至 2.33.12（不含 2.33.12）、2.34.0 至 2.34.8（不含 2.34.8）以及 2.35.0 至 2.35.4（不含 2.35.4）存在一个不充分的域名验证漏洞。该漏洞位于 函数中，其使用的 模式仅执行前缀匹配，导致任何作为工作区代理访问 URL 字符串前缀的域名均会被信任为代理。攻击者若控制此类域名，可诱使已认证受害者访问精心构造的 链接，从而截获重定向过程中泄露的 API 密钥，并凭此密钥重放请求以访问受害者的工作区应用。

CVSS 7.7 · High EPSS 0.21% · P10

Affected Version Matrix 8

VendorProduct Version RangeStatus
coder coder 2.35.0< 2.35.4 affected
2.35.4 unaffected
2.34.0< 2.34.8 affected
2.34.8 unaffected
2.33.0< 2.33.12 affected
2.33.12 unaffected
< 2.29.20 affected
2.29.20 unaffected
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I. Basic Information for CVE-2026-111927

Vulnerability Information
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Vulnerability Title
Coder before 2.35.4 Credential Theft via Workspace Proxy Hostname Prefix Match
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
coder coder 2.35.0 ~ 2.35.4 -
coder coder 2.34.0 ~ 2.34.8 -
coder coder 2.33.0 ~ 2.33.12 -
coder coder 0 ~ 2.29.20 -

II. Public POCs for CVE-2026-111927

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III. Intelligence Information for CVE-2026-111927

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Vendor Advisories for CVE-2026-111927 (2)

Same Patch Batch · coder · 2026-10-17 · 11 CVEs total

CVE-2026-111928 5.4 MEDIUM Coder 2.0.0 before 2.34.8 Authorization Bypass via User-Level ACL in RBAC Policy
CVE-2026-111929 5.3 MEDIUM Coder 2.30.0 before 2.34.8 Cross-Organization File Disclosure via DownloadFile RPC
CVE-2024-58398 4.3 MEDIUM Coder 2.3.1 before 2.16.1 Open Redirect via Login Page redirect Parameter
CVE-2026-111930 4.3 MEDIUM Coder from 2.26.0 before 2.34.8 Information Disclosure via Workspace ACL Endpoint
CVE-2026-111931 4.3 MEDIUM Coder 2.0.0 before 2.34.8 Open Redirect via Workspace App Proxy
CVE-2025-71435 4.2 MEDIUM Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token
CVE-2026-111933 3.7 LOW Coder before 2.34.2 User Enumeration via Login Placeholder Hash
CVE-2026-111934 3.7 LOW Coder before 2.34.7 IP Spoofing via X-Forwarded-For Header
CVE-2026-111932 3.4 LOW Coder before 2.34.2 Stored HTML Injection via Appearance Settings
CVE-2026-111926 3.3 LOW Coder from 2.10.0 before 2.34.8 Information Disclosure via Agent /debug/manifest

IV. Related Vulnerabilities

Same product: coder
Same vendor: coder
Same weakness: CWE-522

V. Comments for CVE-2026-111927

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