Login Request a demo
High severity · published Jul 23, 2026
CVE-2026-65604
Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass
8.2
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SK
skipper · zalando
All versions, or not specified · source: vendor
Affected product
SK
skipper
zalando
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65604
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65604
vendor-advisory
https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734
third-party-advisory
https://www.vulncheck.com/advisories/skipper-incomplete-fix-for-cve-2026-50197-policy-bypass
More from skipper
9.8
CVE-2022-38580
Zalando Skipper v0.13.236 is vulnerable to Server-Side Request Forgery (SSRF)
8.8
CVE-2026-23742
Skipper arbitrary code execution through lua filters
8.2
CVE-2026-65838
Skipper: 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 upstream
8.1
CVE-2026-24470
Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName
7.8
CVE-2026-50197
Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests