Soupwebsocketextensiondeflate: libsoup: libsoup: websocket permessage-deflate unbounded decompression remote denial of service
CVE-2026-15709 is fixed in 14 products on 1 platform, first by RHSA-2026:71389, released July 14, 2026. It is not reported as exploited. Patch Radar priority: High.
The libsoup packages provide an HTTP client and server library for GNOME. Security Fix(es): * SoupWebsocketExtensionDeflate: libsoup: libsoup: WebSocket permessage-deflate Unbounded Decompression Remote Denial of Service (CVE-2026-15709) * libsoup: SoupWebsocketConnection: libsoup: WebSocket remote denial of service via oversized control frame protocol violation (CVE-2026-15711) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libsoup · RHEL 9 | 0:2.72.0-16.el9_8.3 | RHSA-2026:68234 | Sep 19, 2026 |
| libsoup · almalinux 9 | 2.72.0-16.el9_8.3 | ALSA-2026:68234 | Sep 16, 2026 |
| libsoup · amzn 2023 | 2.72.0-6.amzn2023.0.14 | ALAS2023-2026-2160 | Sep 14, 2026 |
| libsoup · ol 9 | 0:2.72.0-16.el9_8.3 | ELSA-2026-68234 | Sep 16, 2026 |
| libsoup · rocky 9 | 0:2.72.0-16.el9_8.3 | RLSA-2026:68234 | Sep 17, 2026 |
| libsoup-debuginfo · amzn 2023 | 2.72.0-6.amzn2023.0.14 | ALAS2023-2026-2160 | Sep 14, 2026 |
| libsoup-debugsource · amzn 2023 | 2.72.0-6.amzn2023.0.14 | ALAS2023-2026-2160 | Sep 14, 2026 |
| libsoup-devel · RHEL 9 | 0:2.72.0-16.el9_8.3 | RHSA-2026:68234 | Sep 19, 2026 |
| libsoup-devel · almalinux 9 | 2.72.0-16.el9_8.3 | ALSA-2026:68234 | Sep 16, 2026 |
| libsoup-devel · amzn 2023 | 2.72.0-6.amzn2023.0.14 | ALAS2023-2026-2160 | Sep 14, 2026 |
| libsoup-devel · ol 9 | 0:2.72.0-16.el9_8.3 | ELSA-2026-68234 | Sep 16, 2026 |
| libsoup-doc · amzn 2023 | 2.72.0-6.amzn2023.0.14 | ALAS2023-2026-2160 | Sep 14, 2026 |
| libsoup3 · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| libsoup3 · RHEL 10 | 3.6.5-3.el10_0.17 | RHSA-2026:71389 | Jul 14, 2026 |
| libsoup3 · almalinux 10 | 3.6.5-3.el10_2.14 | ALSA-2026:68235 | Sep 16, 2026 |
| libsoup3 · amzn 2023 | 3.6.6-60.amzn2023 | ALAS2023-2026-2159 | Sep 14, 2026 |
| libsoup3 · ol 10 | 0:3.6.5-3.el10_2.14 | ELSA-2026-68235 | Sep 17, 2026 |
| libsoup3-debuginfo · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| libsoup3-debuginfo · amzn 2023 | 3.6.6-60.amzn2023 | ALAS2023-2026-2159 | Sep 14, 2026 |
| libsoup3-debugsource · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| libsoup3-debugsource · amzn 2023 | 3.6.6-60.amzn2023 | ALAS2023-2026-2159 | Sep 14, 2026 |
| libsoup3-devel · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| libsoup3-devel · almalinux 10 | 3.6.5-3.el10_2.14 | ALSA-2026:68235 | Sep 16, 2026 |
| libsoup3-devel · amzn 2023 | 3.6.6-60.amzn2023 | ALAS2023-2026-2159 | Sep 14, 2026 |
| libsoup3-devel · ol 10 | 0:3.6.5-3.el10_2.14 | ELSA-2026-68235 | Sep 17, 2026 |
| libsoup3-doc · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| libsoup3-doc · almalinux 10 | 3.6.5-3.el10_2.14 | ALSA-2026:68235 | Sep 16, 2026 |
| libsoup3-doc · amzn 2023 | 3.6.6-60.amzn2023 | ALAS2023-2026-2159 | Sep 14, 2026 |
| libsoup3-doc · ol 10 | 0:3.6.5-3.el10_2.14 | ELSA-2026-68235 | Sep 17, 2026 |
| mingw32-libsoup3 · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| mingw32-libsoup3-debuginfo · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| mingw64-libsoup3 · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
| mingw64-libsoup3-debuginfo · Fedora 43 | 3.6.6-5.fc43 | FEDORA-2026-FCE2F41203 | Sep 5, 2026 |
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