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SUSE: cpp-httplib Urgent IP Spoofing and Log Corruption Patch 2026:20090-2

suse
Calendar Grey January 20, 2026
Dist Suse Esm H88
Critical security update available for cpp-httplib addressing IP spoofing and log poisoning issues in SUSE.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for cpp-httplib fixes the following issues: * CVE-2025-66570: IP spoofing, log poisoning, and authorization bypass via header shadowing due to acceptance and parsing of client-controlled injected HTTP headers in incoming requests (bsc#1254734). * CVE-2025-66577: access and error log poisoning with spoofed client IPs due to unconditional acceptance of client-controlled `X-Forwarded-For` and `X-Real-IP` headers (bsc#1254735). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-150=1 * SUSE Linux Enterprise Server for SAP Applications 16.0

Topics%20covered

Topics Covered

security advisory critical SuSE ip-spoofing http header cpp-httplib

References

* bsc#1254734

* bsc#1254735

Cross-

* CVE-2025-66570

* CVE-2025-66577

CVSS scores:

* CVE-2025-66570 ( SUSE ): 9.1

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

* CVE-2025-66570 ( SUSE ): 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

* CVE-2025-66570 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-66570 ( NVD ): 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

* CVE-2025-66577 ( SUSE ): 6.3

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

* CVE-2025-66577 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

* CVE-2025-66577 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Products:

* SUSE Linux Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP Applications 16.0

Severity
critical
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20090-1
Release Date: 2026-01-15T22:11:25Z
Rating: critical

Topics%20covered

Topics Covered

security advisory critical SuSE ip-spoofing http header cpp-httplib

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