Riskcovery

CVE-2025-14523

Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)

State
Published
Severity
8.2 High
Published
Dec 11, 2025
Updated
Jun 29, 2026
Reserved
Dec 11, 2025

Read the record on cve.org

Description

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.

Scores

CVSSScoreVectorSource
3.18.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:Nredhat

Weaknesses

  • CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Affected Products

ProductVersions
Red Hat Enterprise Linux 10Red Hat
  • 0:3.6.5-3.el10_1.8 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat
  • 0:3.6.5-3.el10_0.11 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 0:2.62.2-10.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:2.62.3-11.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:8.10-6.el8_10.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 0:2.62.3-11.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat
  • 0:2.62.3-1.el8_2.7 and laterNot affected
Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat
  • 0:8.10-6.el8_2.1 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 0:2.62.3-2.el8_4.7 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 0:8.10-6.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 0:2.62.3-2.el8_4.7 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 0:8.10-6.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 0:2.62.3-2.el8_6.7 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 0:8.10-6.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat
  • 0:2.62.3-2.el8_6.7 and laterNot affected
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat
  • 0:8.10-6.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat
  • 0:2.62.3-2.el8_6.7 and laterNot affected
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat
  • 0:8.10-6.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 0:2.62.3-3.el8_8.7 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 0:8.10-6.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 0:2.62.3-3.el8_8.7 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 0:8.10-6.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:2.72.0-12.el9_7.3 and laterNot affected
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat
  • 0:2.72.0-8.el9_0.8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:2.72.0-8.el9_2.8 and laterNot affected
Red Hat Enterprise Linux 9.4 Extended Update SupportRed Hat
  • 0:2.72.0-8.el9_4.8 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:2.72.0-10.el9_6.5 and laterNot affected
Red Hat Enterprise Linux 6Red Hat

    References

    Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.