CVE-2026-65604: high-severity vulnerability in zalando skipper
Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.4%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
zalando · skipperRelated CVEs — zalando skipper
In the same product, most dangerous first.
CVE-2026-23742HIGHSkipper arbitrary code execution through lua filtersEPSS 0.5%CVE-2026-50197HIGHSkipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requestsEPSS 0.5%CVE-2026-65838HIGHSkipper: an oversized declared-`Content-Length` body still hands OPA an empty `parsed_body`, so deny-on-presence Rego policies fail OPEN while the full payload reaches upstreamEPSS 0.5%CVE-2026-86043HIGHSkipper: OPA body-authz bypass: truncated_body mitigation fails open on chunked/HTTP-2 (incomplete fix CVE-2026-50197)EPSS 0.5%CVE-2026-54246MEDIUMSkipper routesrv-no-auth: All routesrv API Endpoints Lack AuthenticationEPSS 0.3%CVE-2026-24470HIGHSkipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalNameEPSS 0.3%