CVE-2025-14523 (GCVE-0-2025-14523)

Vulnerability from cvelistv5 – Published: 2025-12-11 12:30 – Updated: 2026-03-19 14:35
VLAI
Title
Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)
Summary
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.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:0421 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0422 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0423 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0836 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0867 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0868 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0905 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0906 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0907 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0908 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0909 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0911 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0925 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1509 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1569 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1570 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1571 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1572 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2025-14523 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2421349 issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/issues/472
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:3.6.5-3.el10_1.8 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.1
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:3.6.5-3.el10_0.11 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:2.62.2-10.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.62.3-11.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:8.10-6.el8_10.1 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:2.62.3-1.el8_2.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.2::appstream
    cpe:/o:redhat:rhel_aus:8.2::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:8.10-6.el8_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:2.62.3-2.el8_4.7 , < * (rpm)
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:8.10-6.el8_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:2.62.3-2.el8_4.7 , < * (rpm)
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:8.10-6.el8_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:2.62.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:8.10-6.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 0:2.62.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 0:8.10-6.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 0:2.62.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 0:8.10-6.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/a:redhat:rhel_e4s:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:2.62.3-3.el8_8.7 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_tus:8.8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:8.10-6.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:2.62.3-3.el8_8.7 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_tus:8.8::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:8.10-6.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.72.0-12.el9_7.3 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 0:2.72.0-8.el9_0.8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.0::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:2.72.0-8.el9_2.8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 0:2.72.0-8.el9_4.8 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:2.72.0-10.el9_6.5 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Date Public
2025-12-11 00:00
Credits
Red Hat would like to thank Ky0toFu and Sovereign Tech Resilience program for reporting this issue.
Show details on NVD website
To clipboard 

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of use and deployment, applicability to widespread installation base or stability.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw in libsoup\\u2019s 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-444\", \"description\": \"Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-03-19T14:35:08.581Z\"}, \"x_redhatCweChain\": \"CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-14523\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-19T14:35:08.581Z\", \"dateReserved\": \"2025-12-11T07:03:53.445Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2025-12-11T12:30:59.266Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.