Improper Handling of Length Parameter Inconsistency Affecting kube-fluentd-operator package, versions <1.18.2-r67


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.15% (5th percentile)

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  • Snyk IDSNYK-WOLFILATEST-KUBEFLUENTDOPERATOR-17254091
  • published9 Jun 2026
  • disclosed2 Apr 2026

Introduced: 2 Apr 2026

CVE-2026-34831  (opens in a new tab)
CWE-130  (opens in a new tab)
CWE-135  (opens in a new tab)

How to fix?

Upgrade Wolfi kube-fluentd-operator to version 1.18.2-r67 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kube-fluentd-operator package and not the kube-fluentd-operator package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response header using String#size instead of String#bytesize. When the response body contains multibyte UTF-8 characters, the declared Content-Length is smaller than the number of bytes actually sent on the wire. Because Rack::Files reflects the requested path in 404 responses, an attacker can trigger this mismatch by requesting a non-existent path containing percent-encoded UTF-8 characters. This results in incorrect HTTP response framing and may cause response desynchronization in deployments that rely on the incorrect Content-Length value. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

CVSS Base Scores

version 3.1