Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-65604— Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass

Quick assessment

Affected
zalando skipper
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zalando Skipper是德国zalando公司开源的一个HTTP路由器和反向代理。 zalando Skipper存在输入验证错误漏洞，该漏洞源于对已知错误的不完整修复，导致超大的请求体绕过Open Policy Agent (OPA) deny-on-presence Rego策略。当请求体超过配置的maxBodyBytes限制时，Skipper将完整有效载荷转发到上游服务而OPA对空的parsed_body进行评估，因此基于请求体内容拒绝请求的策略不被执行，禁止的操作继续进行。

CVSS 8.2 · High EPSS 0.39% · P30

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
zalando skipper any affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-65604

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Skipper contains an incomplete fix for CVE-2026-50197 in which oversized request bodies bypass Open Policy Agent (OPA) deny-on-presence Rego policies. When a request body exceeds the configured maxBodyBytes limit, Skipper forwards the full payload to the upstream service while OPA evaluates against an empty parsed_body, so policies that deny requests based on body content are not enforced and forbidden actions proceed. No fixed version is available; v0.27.26 adds documentation guidance only.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
zalando Skipper 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zalando Skipper是德国zalando公司开源的一个HTTP路由器和反向代理。 zalando Skipper存在输入验证错误漏洞，该漏洞源于对已知错误的不完整修复，导致超大的请求体绕过Open Policy Agent (OPA) deny-on-presence Rego策略。当请求体超过配置的maxBodyBytes限制时，Skipper将完整有效载荷转发到上游服务而OPA对空的parsed_body进行评估，因此基于请求体内容拒绝请求的策略不被执行，禁止的操作继续进行。
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
zalando skipper - -

II. Public POCs for CVE-2026-65604

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
Upgrade to Pro+
claude_code · 8712 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-65604

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-65604 (1)

Other References for CVE-2026-65604 (1)

IV. Related Vulnerabilities

Same product: skipper
Same vendor: zalando
Same weakness: CWE-20

V. Comments for CVE-2026-65604

No comments yet

Leave a comment