Interpretation Conflict Affecting rmt-server-config package, versions <2.27-150700.3.20.1


Severity

Recommended
medium

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-SLES157-RMTSERVERCONFIG-16538653
  • published8 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-26961  (opens in a new tab)
CWE-436  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 rmt-server-config to version 2.27-150700.3.20.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rmt-server-config package and not the rmt-server-config package as distributed by SLES. See How to fix? for SLES:15.7 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::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermediary interprets the first boundary parameter, this mismatch can allow an attacker to smuggle multipart content past upstream inspection and have Rack parse a different body structure than the intermediary validated. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

CVSS Base Scores

version 3.1