# CVE-2025-14523: Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)

CVE-2025-14523 is fixed in 14 products on 1 platform, first by RHSA-2026:0836, released December 11, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-14523
- Priority: High
- CVSS: 8.2 (Important)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 11, 2025
- Weakness: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-14523

## Description

This update for libsoup fixes the following issues:  - CVE-2026-0716: Fixed out-of-bounds read for websocket (bsc#1256418) - CVE-2026-0719: Fixed overflow for password md4sum (bsc#1256399) - CVE-2025-14523: Reject duplicated Host in headers and followed upstream update (bsc#1254876).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libsoup RHEL 8 | 0:2.62.3-11.el8_10 | [RHSA-2026:0421](https://patchblox.com/security/data/fix/linux/rhsa-2026-0421.md) | Jan 16, 2026 |
| Linux | libsoup RHEL 9 | 0:2.72.0-12.el9_7.3 | [RHSA-2026:0422](https://patchblox.com/security/data/fix/linux/rhsa-2026-0422.md) | Jan 16, 2026 |
| Linux | libsoup almalinux 8 | 2.62.3-11.el8_10 | [ALSA-2026:0421](https://patchblox.com/security/data/fix/linux/alsa-2026-0421.md) | Jan 12, 2026 |
| Linux | libsoup almalinux 9 | 2.72.0-12.el9_7.3 | [ALSA-2026:0422](https://patchblox.com/security/data/fix/linux/alsa-2026-0422.md) | Jan 12, 2026 |
| Linux | libsoup amzn 2023 | 2.72.0-6.amzn2023.0.10 | [ALAS2023-2026-1391](https://patchblox.com/security/data/fix/linux/alas2023-2026-1391.md) | Feb 5, 2026 |
| Linux | libsoup ol 8 | 0:2.62.3-11.el8_10 | [ELSA-2026-0421](https://patchblox.com/security/data/fix/linux/elsa-2026-0421.md) | Jan 12, 2026 |
| Linux | libsoup ol 9 | 0:2.72.0-12.el9_7.3 | [ELSA-2026-0422](https://patchblox.com/security/data/fix/linux/elsa-2026-0422.md) | Jan 12, 2026 |
| Linux | libsoup opensuse-leap 15.6 | 3.4.4-150600.3.28.1 | [SUSE-SU-2026:0257-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0257-1.md) | Jan 22, 2026 |
| Linux | libsoup opensuse-leap 16.0 | 3.6.6-160000.1.1 | [OPENSUSE-SU-2026:20384-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20384-1.md) | Mar 18, 2026 |
| Linux | libsoup rocky 8 | 0:2.62.3-11.el8_10 | [RLSA-2026:0421](https://patchblox.com/security/data/fix/linux/rlsa-2026-0421.md) | Jan 14, 2026 |
| Linux | libsoup rocky 9 | 0:2.72.0-12.el9_7.3 | [RLSA-2026:0422](https://patchblox.com/security/data/fix/linux/rlsa-2026-0422.md) | Jan 15, 2026 |
| Linux | libsoup sles 15.6 | 3.4.4-150600.3.28.1 | [SUSE-SU-2026:0257-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0257-1.md) | Jan 22, 2026 |
| Linux | libsoup sles 15.7 | 3.4.4-150600.3.28.1 | [SUSE-SU-2026:0257-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0257-1.md) | Jan 22, 2026 |
| Linux | libsoup sles 16.0 | 3.6.6-160000.1.1 | [SUSE-SU-2026:20902-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20902-1.md) | Mar 18, 2026 |
| Linux | libsoup-debuginfo amzn 2023 | 2.72.0-6.amzn2023.0.10 | [ALAS2023-2026-1391](https://patchblox.com/security/data/fix/linux/alas2023-2026-1391.md) | Feb 5, 2026 |
| Linux | libsoup-debugsource amzn 2023 | 2.72.0-6.amzn2023.0.10 | [ALAS2023-2026-1391](https://patchblox.com/security/data/fix/linux/alas2023-2026-1391.md) | Feb 5, 2026 |
| Linux | libsoup-devel RHEL 8 | 0:2.62.3-11.el8_10 | [RHSA-2026:0421](https://patchblox.com/security/data/fix/linux/rhsa-2026-0421.md) | Jan 16, 2026 |
| Linux | libsoup-devel RHEL 9 | 0:2.72.0-12.el9_7.3 | [RHSA-2026:0422](https://patchblox.com/security/data/fix/linux/rhsa-2026-0422.md) | Jan 16, 2026 |
| Linux | libsoup-devel almalinux 8 | 2.62.3-11.el8_10 | [ALSA-2026:0421](https://patchblox.com/security/data/fix/linux/alsa-2026-0421.md) | Jan 12, 2026 |
| Linux | libsoup-devel almalinux 9 | 2.72.0-12.el9_7.3 | [ALSA-2026:0422](https://patchblox.com/security/data/fix/linux/alsa-2026-0422.md) | Jan 12, 2026 |
| Linux | libsoup-devel amzn 2023 | 2.72.0-6.amzn2023.0.10 | [ALAS2023-2026-1391](https://patchblox.com/security/data/fix/linux/alas2023-2026-1391.md) | Feb 5, 2026 |
| Linux | libsoup-devel ol 8 | 0:2.62.3-11.el8_10 | [ELSA-2026-0421](https://patchblox.com/security/data/fix/linux/elsa-2026-0421.md) | Jan 12, 2026 |
| Linux | libsoup-devel ol 9 | 0:2.72.0-12.el9_7.3 | [ELSA-2026-0422](https://patchblox.com/security/data/fix/linux/elsa-2026-0422.md) | Jan 12, 2026 |
| Linux | libsoup-doc amzn 2023 | 2.72.0-6.amzn2023.0.10 | [ALAS2023-2026-1391](https://patchblox.com/security/data/fix/linux/alas2023-2026-1391.md) | Feb 5, 2026 |
| Linux | libsoup2 opensuse-leap 15.6 | 2.74.3-150600.4.19.1 | [SUSE-SU-2026:0253-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0253-1.md) | Jan 22, 2026 |
| Linux | libsoup2 opensuse-leap 16.0 | 2.74.3-160000.4.1 | [OPENSUSE-SU-2026:20354-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20354-1.md) | Mar 13, 2026 |
| Linux | libsoup2 sles 15.6 | 2.74.3-150600.4.19.1 | [SUSE-SU-2026:0253-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0253-1.md) | Jan 22, 2026 |
| Linux | libsoup2 sles 15.7 | 2.74.3-150600.4.19.1 | [SUSE-SU-2026:0253-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0253-1.md) | Jan 22, 2026 |
| Linux | libsoup3 RHEL 10 | 3.6.5-3.el10_0.11 | [RHSA-2026:0836](https://patchblox.com/security/data/fix/linux/rhsa-2026-0836.md) | Dec 11, 2025 |
| Linux | libsoup3 amzn 2023 | 3.6.5-55.amzn2023 | [ALAS2023-2026-1394](https://patchblox.com/security/data/fix/linux/alas2023-2026-1394.md) | Feb 5, 2026 |
| Linux | libsoup3 ol 10 | 0:3.6.5-3.el10_1.8 | [ELSA-2026-0423](https://patchblox.com/security/data/fix/linux/elsa-2026-0423.md) | Jan 12, 2026 |
| Linux | libsoup3 rocky 10 | 0:3.6.5-3.el10_1.8 | [RLSA-2026:0423](https://patchblox.com/security/data/fix/linux/rlsa-2026-0423.md) | Jan 15, 2026 |
| Linux | libsoup3-debuginfo amzn 2023 | 3.6.5-55.amzn2023 | [ALAS2023-2026-1394](https://patchblox.com/security/data/fix/linux/alas2023-2026-1394.md) | Feb 5, 2026 |
| Linux | libsoup3-debugsource amzn 2023 | 3.6.5-55.amzn2023 | [ALAS2023-2026-1394](https://patchblox.com/security/data/fix/linux/alas2023-2026-1394.md) | Feb 5, 2026 |
| Linux | libsoup3-devel amzn 2023 | 3.6.5-55.amzn2023 | [ALAS2023-2026-1394](https://patchblox.com/security/data/fix/linux/alas2023-2026-1394.md) | Feb 5, 2026 |
| Linux | libsoup3-devel ol 10 | 0:3.6.5-3.el10_1.8 | [ELSA-2026-0423](https://patchblox.com/security/data/fix/linux/elsa-2026-0423.md) | Jan 12, 2026 |
| Linux | libsoup3-doc almalinux 10 | 3.6.5-3.el10_1.8 | [ALSA-2026:0423](https://patchblox.com/security/data/fix/linux/alsa-2026-0423.md) | Jan 12, 2026 |
| Linux | libsoup3-doc amzn 2023 | 3.6.5-55.amzn2023 | [ALAS2023-2026-1394](https://patchblox.com/security/data/fix/linux/alas2023-2026-1394.md) | Feb 5, 2026 |
| Linux | libsoup3-doc ol 10 | 0:3.6.5-3.el10_1.8 | [ELSA-2026-0423](https://patchblox.com/security/data/fix/linux/elsa-2026-0423.md) | Jan 12, 2026 |
| Linux | spice-client-win rocky 8 | 0:8.10-6.el8_10.1 | [RLSA-2026:1509](https://patchblox.com/security/data/fix/linux/rlsa-2026-1509.md) | Jan 30, 2026 |
| Linux | spice-client-win-x64 RHEL 8 | 0:8.10-6.el8_10.1 | [RHSA-2026:1509](https://patchblox.com/security/data/fix/linux/rhsa-2026-1509.md) | Jan 28, 2026 |
| Linux | spice-client-win-x86 RHEL 8 | 0:8.10-6.el8_10.1 | [RHSA-2026:1509](https://patchblox.com/security/data/fix/linux/rhsa-2026-1509.md) | Jan 28, 2026 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.