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CVE-2026-55434— Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints

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 2.33.8之前版本和2.34.2之前版本存在资源管理错误漏洞，该漏洞源于AI Bridge provider handlers使用io.ReadAll读取请求体时未设置最大大小，可能导致已认证用户通过发送大量数据耗尽内存，造成拒绝服务。

CVSS 6.5 · Medium EPSS 0.55% · P46

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
coder coder >= 2.34.0, < 2.34.2 affected
>= 2.33.0, < 2.33.8 affected
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I. Basic Information for CVE-2026-55434

Vulnerability Information
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Vulnerability Title
Coder vulnerable to denial of service via unbounded request body in AI Bridge provider endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.33.0 and prior to versions 2.33.8 and 2.34.2, AI Bridge provider handlers read request bodies with `io.ReadAll` without a maximum size so an authenticated user with AI Bridge access could send an arbitrarily large body and exhaust memory. Exploitation requires authenticated access to the AI Bridge endpoints and the impact is limited to availability (denial of service). Versions 2.33.8 and 2.34.2 patch the issue. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Coder 资源管理错误漏洞
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 2.33.8之前版本和2.34.2之前版本存在资源管理错误漏洞，该漏洞源于AI Bridge provider handlers使用io.ReadAll读取请求体时未设置最大大小，可能导致已认证用户通过发送大量数据耗尽内存，造成拒绝服务。
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-2026-55434

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III. Intelligence Information for CVE-2026-55434

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Patches & Fixes for CVE-2026-55434 (1)

Vendor Advisories for CVE-2026-55434 (1)

Vendor Pages for CVE-2026-55434 (2)

Same Patch Batch · coder · 2026-07-07 · 12 CVEs total

CVE-2026-46354 9.1 CRITICAL Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent tok
CVE-2026-55427 8.3 HIGH Coder vulnerable to SSH config injection via unsanitized server-supplied values in `coder
CVE-2026-55428 8.2 HIGH Coder: Route hijacking through lack of validation of agent-supplied AllowedIPs in tailnet
CVE-2026-44454 8.1 HIGH Coder vulnerable to workspace auto-creation via crafted URL parameters without user consen
CVE-2026-55075 7.4 HIGH Coder vulnerable to OIDC account takeover via email-based user matching and email_verified
CVE-2026-55076 7.4 HIGH Coder's OIDC email_verified type coercion bypass enables account takeover via unverified e
CVE-2026-55077 7.2 HIGH Coder: User-admin role can reset owner account password
CVE-2026-45796 6.5 MEDIUM Coder vulnerable to unauthenticated SSRF via Azure Instance Identity Endpoint
CVE-2026-55078 6.5 MEDIUM Coder: Zip upload decompression lacks aggregate size limit, enabling denial of service
CVE-2026-55435 5.4 MEDIUM Suspended Coder users retain access to AI Bridge LLM proxy endpoints
CVE-2026-55079 4.9 MEDIUM Coder's unbounded memory allocation in provisioner file upload allows authenticated denial

IV. Related Vulnerabilities

Same product: coder
Same vendor: coder
Same weakness: CWE-770