SB2026051878 - SUSE update for rmt-server
Published: May 18, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 vulnerabilities.
1) Interpretation Conflict (CVE-ID: CVE-2026-26961)
CWE-ID: CWE-436 - Interpretation Conflict
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the "Rack::Multipart::Parser" extracts the "boundary" parameter from multipart/form-data using a greedy regular expression. A remote attacker can bypass upstream filtering of uploaded files or form fields.
2) CRLF injection (CVE-ID: CVE-2026-26962)
CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data within Rack::Multipart::Parser. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
3) Resource exhaustion (CVE-ID: CVE-2026-34230)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in "Rack::Utils.select_best_encoding". A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
4) Permissive Regular Expression (CVE-ID: CVE-2026-34763)
CWE-ID: CWE-625 - Permissive Regular Expression
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to unescaped regex interpolation in "Rack::Directory". A remote attacker can cause Root directory disclosure on the system.
5) Partial String Comparison (CVE-ID: CVE-2026-34785)
CWE-ID: CWE-187 - Partial String Comparison
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to partial string comparison issue in "Rack::Static". A remote attacker can gain unauthorized access to sensitive information on the system.
6) Incorrect Behavior Order: Validate Before Canonicalize (CVE-ID: CVE-2026-34786)
CWE-ID: CWE-180 - Incorrect Behavior Order: Validate Before Canonicalize
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to incorrect behavior order when "Rack::Static#applicable_rules" evaluates several "header_rules" types. A remote attacker can request an encoded form of the path and bypass those headers.
7) Resource exhaustion (CVE-ID: CVE-2026-34826)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within excessive overlapping ranges. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
8) Resource exhaustion (CVE-ID: CVE-2026-34829)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources without "Content-Length" header. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
9) Permissive Regular Expression (CVE-ID: CVE-2026-34830)
CWE-ID: CWE-625 - Permissive Regular Expression
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to permissive regular expression in "Rack::Sendfile#map_accel_path". A remote attacker can cause nginx to serve unintended files from configured internal locations.
10) Improper Handling of Length Parameter Inconsistency (CVE-ID: CVE-2026-34831)
CWE-ID: CWE-130 - Improper Handling of Length Parameter Inconsistency
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to "Content-Length" mismatch in "Rack::Files" error responses. A remote attacker can cause response parsing inconsistencies or response desynchronization.
Remediation
Install update from vendor's website.