# CVE-2026-15712: Soupclientmessageiohttp2: libsoup3: libsoup: http/2 goaway frame parsing heap buffer over-read via invalid nul-termination assumption CVE-2026-15712 is fixed in 10 products on 1 platform, first by FEDORA-2026-FCE2F41203, released September 5, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-15712 - Priority: Routine - CVSS: 5.9 (Moderate) - EPSS: 0.0063 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 17, 2026 - Weakness: Out-of-bounds Read - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-15712 ## Description This update for libsoup fixes the following issues: - CVE-2026-12478: websocket: Fix out-of-bounds read when reading unmasked frame (bsc#1271401). - CVE-2026-12547: Header 'Proxy-Authorization' leads to credentials being send to different proxy after proxy switch (bsc#1272195). - CVE-2026-15711: SoupWebsocketConnection: WebSocket remote denial of service via oversized control frame protocol violation (bsc#1271446). - CVE-2026-15712: SoupClientMessageIOHTTP2: HTTP/2 GOAWAY frame parsing heap buffer over-read via invalid NUL- termination assumption (bsc#1271447). - CVE-2026-15714: SoupMultipartInputStream: libsoup: Out-of-bounds read in soup_multipart_input_stream_read_headers via an oversized multipart boundary string (bsc#1271449). - CVE-2026-66339: proxy credentials leak to destination server via `Proxy-Authorization` header in CONNECT tunnels (bsc#1273156). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libsoup opensuse-leap 16.0 | 3.6.6-160000.5.1 | [OPENSUSE-SU-2026:22181-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22181-1.md) | Nov 7, 2026 | | Linux | libsoup sles 15.6 | 3.4.4-150600.3.56.1 | [SUSE-SU-2026:4558-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4558-1.md) | Oct 7, 2026 | | Linux | libsoup sles 15.7 | 3.4.4-150600.3.56.1 | [SUSE-SU-2026:4558-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4558-1.md) | Oct 7, 2026 | | Linux | libsoup sles 16.0 | 3.6.6-160000.5.1 | [SUSE-SU-2026:24470-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24470-1.md) | Nov 7, 2026 | | Linux | libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3 amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-debuginfo amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-debugsource Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-debugsource amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-devel Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-devel amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-doc Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-doc amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | mingw32-libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw32-libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw64-libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw64-libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | --- Data as of 2026-11-10T07:50:38Z UTC. 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