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CVE-2026-55432— Coder's sub-agent app registration bypasses template port-sharing policy enforcement

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是Coder组织开源的一个可以在公共或私有云基础设施中设置开发环境的应用程序。 Coder存在授权问题漏洞，该漏洞源于 RPC在持久化工作区apps之前未将请求的应用共享级别与模板的 进行验证，导致工作区所有者可以超过管理员配置的最大值。以下版本受到影响：2.29.17之前版本、2.32.7之前版本（自2.30.0起）、2.33.8之前版本（自2.33.0起）和2.34.2之前版本（自2.34.0起）。

CVSS 5.4 · Medium EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
coder coder >= 2.34.0, < 2.34.2 affected
>= 2.33.0, < 2.33.8 affected
>= 2.30.0, < 2.32.7 affected
< 2.29.17 affected
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I. Basic Information for CVE-2026-55432

Vulnerability Information
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Vulnerability Title
Coder's sub-agent app registration bypasses template port-sharing policy enforcement
Source: CVE Program / CVE List V5
Vulnerability Description
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, the `CreateSubAgent` RPC did not validate a requested app sharing level against the template's `MaxPortSharingLevel` before persisting workspace apps, letting a workspace owner exceed the administrator's configured maximum. Exploitation requires the ability to register sub-agent apps in a workspace the attacker controls. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2clamps the sub-agent app sharing level to the template's `MaxPortSharingLevel`. As a workaround, disable wildcard app hostnames (`CODER_WILDCARD_ACCESS_URL`) to block subdomain-based app routing.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Coder 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Coder是Coder组织开源的一个可以在公共或私有云基础设施中设置开发环境的应用程序。 Coder存在授权问题漏洞，该漏洞源于`CreateSubAgent` RPC在持久化工作区apps之前未将请求的应用共享级别与模板的`MaxPortSharingLevel`进行验证，导致工作区所有者可以超过管理员配置的最大值。以下版本受到影响：2.29.17之前版本、2.32.7之前版本（自2.30.0起）、2.33.8之前版本（自2.33.0起）和2.34.2之前版本（自2.34.0起）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
coder coder >= 2.34.0, < 2.34.2 -

II. Public POCs for CVE-2026-55432

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III. Intelligence Information for CVE-2026-55432

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Patches & Fixes for CVE-2026-55432 (1)

Vendor Advisories for CVE-2026-55432 (1)

Vendor Pages for CVE-2026-55432 (4)

Same Patch Batch · coder · 2026-07-08 · 8 CVEs total

CVE-2026-55429 8.7 HIGH Coder's workspace app upsert allows cross-workspace agent rebinding via user-controlled ap
CVE-2026-55431 7.7 HIGH Coder's session token leaked to arbitrary hosts via `coder open app` for external workspac
CVE-2026-55436 7.4 HIGH Coder's AI Bridge Proxy skips TLS certificate verification in default configuration
CVE-2026-55438 5.8 MEDIUM Coder's workspace app CORS origin check can be bypassed via UUID-based subdomain spoofing
CVE-2026-55430 5.8 MEDIUM Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, en
CVE-2026-55437 5.4 MEDIUM Coder vulnerable to stored HTML injection via workspace agent logs in AgentLogLine compone
CVE-2026-55433 5.4 MEDIUM Coder: Devcontainer recreate endpoint missing write authorization allows read-only roles t

IV. Related Vulnerabilities

Same product: coder
Same vendor: coder
Same weakness: CWE-862

V. Comments for CVE-2026-55432

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