High severity8.2NVD Advisory· Published Dec 11, 2025· Updated Apr 15, 2026
CVE-2025-14523
CVE-2025-14523
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
45- osv-coords44 versionspkg:rpm/almalinux/libsouppkg:rpm/almalinux/libsoup3pkg:rpm/almalinux/libsoup3-develpkg:rpm/almalinux/libsoup3-docpkg:rpm/almalinux/libsoup-develpkg:rpm/opensuse/libsoup2&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/libsoup2&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/libsoup2&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/libsoup&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/libsoup&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/libsoup&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/libsoup2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/libsoup&distro=SUSE%20Linux%20Micro%206.2
< 2.62.3-11.el8_10+ 43 more
- (no CPE)range: < 2.62.3-11.el8_10
- (no CPE)range: < 3.6.5-3.el10_1.8
- (no CPE)range: < 3.6.5-3.el10_1.8
- (no CPE)range: < 3.6.5-3.el10_1.8
- (no CPE)range: < 2.62.3-11.el8_10
- (no CPE)range: < 2.74.3-150600.4.19.1
- (no CPE)range: < 2.74.3-160000.4.1
- (no CPE)range: < 2.74.3-13.1
- (no CPE)range: < 3.4.4-150600.3.28.1
- (no CPE)range: < 3.6.6-160000.1.1
- (no CPE)range: < 3.6.5-10.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.3-150600.4.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.3-150600.4.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.2-150400.3.19.1
- (no CPE)range: < 2.74.3-150600.4.19.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 2.68.4-150200.4.19.1
- (no CPE)range: < 3.4.4-150600.3.28.1
- (no CPE)range: < 2.62.2-5.23.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.4.4-150600.3.28.1
- (no CPE)range: < 3.6.6-160000.1.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.0.4-150400.3.28.1
- (no CPE)range: < 3.4.4-150600.3.28.1
- (no CPE)range: < 3.6.6-160000.1.1
- (no CPE)range: < 2.62.2-5.23.1
- (no CPE)range: < 3.4.2-10.1
- (no CPE)range: < 3.4.4-slfo.1.1_6.1
- (no CPE)range: < 3.6.6-160000.1.1
Patches
Vulnerability mechanics
References
21- access.redhat.com/errata/RHSA-2026:0421nvd
- access.redhat.com/errata/RHSA-2026:0422nvd
- access.redhat.com/errata/RHSA-2026:0423nvd
- access.redhat.com/errata/RHSA-2026:0836nvd
- access.redhat.com/errata/RHSA-2026:0867nvd
- access.redhat.com/errata/RHSA-2026:0868nvd
- access.redhat.com/errata/RHSA-2026:0905nvd
- access.redhat.com/errata/RHSA-2026:0906nvd
- access.redhat.com/errata/RHSA-2026:0907nvd
- access.redhat.com/errata/RHSA-2026:0908nvd
- access.redhat.com/errata/RHSA-2026:0909nvd
- access.redhat.com/errata/RHSA-2026:0911nvd
- access.redhat.com/errata/RHSA-2026:0925nvd
- access.redhat.com/errata/RHSA-2026:1509nvd
- access.redhat.com/errata/RHSA-2026:1569nvd
- access.redhat.com/errata/RHSA-2026:1570nvd
- access.redhat.com/errata/RHSA-2026:1571nvd
- access.redhat.com/errata/RHSA-2026:1572nvd
- access.redhat.com/security/cve/CVE-2025-14523nvd
- bugzilla.redhat.com/show_bug.cginvd
- gitlab.gnome.org/GNOME/libsoup/-/issues/472nvd
News mentions
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