HTTP Request Smuggling Affecting github.com/zalando/skipper/filters/openpolicyagent package, versions <0.26.10
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published9 Jul 2026
- disclosed8 Jul 2026
- credittonghuaroot
Introduced: 8 Jul 2026
CVE-2026-50197 Â (opens in a new tab)How to fix?
Upgrade github.com/zalando/skipper/filters/openpolicyagent to version 0.26.10 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the ExtractHttpBodyOptionally helper in filters/openpolicyagent/openpolicyagent.go. An attacker can bypass opaAuthorizeRequestWithBody policy checks by sending a chunked HTTP/1.1 request or an HTTP/2 request without Content-Length, causing OPA to evaluate an empty parsed_body while the full body is still forwarded upstream. The policy sees no body content, so deny rules that depend on fields in the request body fail open, and the proxy allows requests that should be blocked. This lets an attacker smuggle forbidden payloads through body-based authorization controls, exposing protected upstream actions to unauthorized access.
Notes
- HTTP/1.1
Transfer-Encoding: chunkedand HTTP/2 requests that omitContent-Lengthtake the same vulnerable path as any other body-bearing request; the bypass is not limited to a special content type or endpoint, but to unknown-length framing.