CVE-2026-50197: CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in zalando skipper
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.
AI Analysis
Technical Summary
The vulnerability arises from inconsistent interpretation of HTTP requests in zalando/skipper's OpenPolicyAgent integration. Specifically, for HTTP/1.1 requests with Transfer-Encoding: chunked and HTTP/2 requests missing the content-length pseudo-header, the opaAuthorizeRequestWithBody filter and OpenPolicyAgentInstance.ExtractHttpBodyOptionally function produce an empty raw_body and parsed_body. Consequently, the policy enforcement bypasses request-body inspection, allowing the upstream service to receive the full attacker-controlled body undetected. This behavior constitutes a form of HTTP request smuggling (CWE-444). The issue is resolved in skipper version 0.26.10.
Potential Impact
An attacker can bypass request-body inspection in the OpenPolicyAgent integration, potentially allowing malicious payloads to reach upstream services without detection or authorization checks. This undermines the security policies enforced by OpenPolicyAgent and may lead to unauthorized actions or data compromise. The CVSS 4.0 score of 7.8 reflects a high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high scope and impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade zalando/skipper to version 0.26.10 or later, where this vulnerability is fixed. Since no official patch links or vendor advisory are provided, verify the upgrade from the official zalando/skipper release notes or repository. No other mitigations are specified.
CVE-2026-50197: CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in zalando skipper
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.
CVSS v4.0
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises from inconsistent interpretation of HTTP requests in zalando/skipper's OpenPolicyAgent integration. Specifically, for HTTP/1.1 requests with Transfer-Encoding: chunked and HTTP/2 requests missing the content-length pseudo-header, the opaAuthorizeRequestWithBody filter and OpenPolicyAgentInstance.ExtractHttpBodyOptionally function produce an empty raw_body and parsed_body. Consequently, the policy enforcement bypasses request-body inspection, allowing the upstream service to receive the full attacker-controlled body undetected. This behavior constitutes a form of HTTP request smuggling (CWE-444). The issue is resolved in skipper version 0.26.10.
Potential Impact
An attacker can bypass request-body inspection in the OpenPolicyAgent integration, potentially allowing malicious payloads to reach upstream services without detection or authorization checks. This undermines the security policies enforced by OpenPolicyAgent and may lead to unauthorized actions or data compromise. The CVSS 4.0 score of 7.8 reflects a high severity with network attack vector, low attack complexity, no privileges or user interaction required, and high scope and impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade zalando/skipper to version 0.26.10 or later, where this vulnerability is fixed. Since no official patch links or vendor advisory are provided, verify the upgrade from the official zalando/skipper release notes or repository. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-03T22:05:13.645Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5b5eb02d1edb114c7fb35c
Added to database: 07/18/2026, 11:08:32 UTC
Last enriched: 07/18/2026, 11:54:41 UTC
Last updated: 07/18/2026, 13:13:22 UTC
Views: 4
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