Incorrect Behavior Order: Validate Before Canonicalize Affecting rmt-server-config package, versions <2.27-150700.3.20.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-SLES157-RMTSERVERCONFIG-16538646
  • published8 May 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-34786  (opens in a new tab)
CWE-180  (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::Static#applicable_rules evaluates several header_rules types against the raw URL-encoded PATH_INFO, while the underlying file-serving path is decoded before the file is served. As a result, a request for a URL-encoded variant of a static path can serve the same file without the headers that header_rules were intended to apply. In deployments that rely on Rack::Static to attach security-relevant response headers to static content, this can allow an attacker to bypass those headers by requesting an encoded form of the path. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

CVSS Base Scores

version 3.1