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CVE-2026-50197— Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests

Quick assessment

Affected
zalando skipper
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.

zalando Skipper是德国zalando公司开源的一个HTTP路由器和反向代理。 zalando skipper 0.26.10之前版本存在输入验证错误漏洞，该漏洞源于OpenPolicyAgent集成对HTTP/1.1 Transfer-Encoding: chunked和缺少content-length伪标头的HTTP/2请求中的请求体检查被静默绕过，导致OPA过滤器产生空的raw_body和input.parsed_body，而上游服务接收完整攻击者控制的请求体。

AI Predicted 9.1 Difficulty: Easy EPSS 0.55% · P44

Affected Version Matrix 1

VendorProduct Version RangeStatus
zalando skipper < 0.26.10 affected
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I. Basic Information for CVE-2026-50197

Vulnerability Information
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Vulnerability Title
Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests
Source: CVE Program / CVE List V5
Vulnerability Description
Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.26.10, zalando/skipper's OpenPolicyAgent integration silently bypasses request-body inspection on HTTP/1.1 Transfer-Encoding: chunked and HTTP/2 requests that omit the content-length pseudo-header, because the opaAuthorizeRequestWithBody filter and OpenPolicyAgentInstance.ExtractHttpBodyOptionally in filters/openpolicyagent/openpolicyagent.go produce an empty raw_body and input.parsed_body while the upstream service receives the full attacker-controlled body. This issue is fixed in version 0.26.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Zalando SE 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 0.26.10之前版本存在输入验证错误漏洞，该漏洞源于OpenPolicyAgent集成对HTTP/1.1 Transfer-Encoding: chunked和缺少content-length伪标头的HTTP/2请求中的请求体检查被静默绕过，导致OPA过滤器产生空的raw_body和input.parsed_body，而上游服务接收完整攻击者控制的请求体。
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 < 0.26.10 -

II. Public POCs for CVE-2026-50197

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III. Intelligence Information for CVE-2026-50197

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Patches & Fixes for CVE-2026-50197 (2)

Vendor Advisories for CVE-2026-50197 (1)

Vendor Pages for CVE-2026-50197 (1)

IV. Related Vulnerabilities

Same product: skipper
Same vendor: zalando
Same weakness: CWE-444

V. Comments for CVE-2026-50197

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