CVE record · CVE-2025-14523

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

CVSS 8.2 HighEPSS 0.0054 · 45th percentile

Published by the CVE Program (CNA: redhat) at 11 Dec 2025, 12:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10 Package name: libsoup3 https://access.redhat.com/downloads/content/package-browser/	unaffected 0:3.6.5-3.el10_1.8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: libsoup3 https://access.redhat.com/downloads/content/package-browser/	unaffected 0:3.6.5-3.el10_0.11 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.2-10.el7_9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-11.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_10.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-11.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-1.el8_2.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_2.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-2.el8_4.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-2.el8_4.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-2.el8_6.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-2.el8_6.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-2.el8_6.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-3.el8_8.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.62.3-3.el8_8.7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: spice-client-win https://access.redhat.com/downloads/content/package-browser/	unaffected 0:8.10-6.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.72.0-12.el9_7.3 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.72.0-8.el9_0.8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.72.0-8.el9_2.8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.72.0-8.el9_4.8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.72.0-10.el9_6.5 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: libsoup https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown

Identifiers: CVE-2025-14523
CNA: redhat
Weakness (CWE): CWE-444
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
HTTP request smuggling
Published: 11 Dec 2025
Updated: 4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0054, the 45th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

11 Dec 2025, 12:30 UTC Confirmed by the CVE List
11 Dec 2025, 13:15 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:0421 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0422 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0423 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0836 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0867 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0868 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0905 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0906 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0907 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0908 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0909 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0911 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0925 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1509 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1569 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1570 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1571 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1572 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2025-14523 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2421349 issue-trackingredhat
gitlab.gnome.org/GNOME/libsoup/-/issues/472

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.