# SUSE-SU-2026:4703-1: libsoup2 security update

SUSE-SU-2026:4703-1, released November 7, 2026, fixes 15 CVEs in libsoup2 (version 2.74.3-150600.4.42.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-4703-1
- Platform: Linux
- Released: Nov 7, 2026
- Priority: High (Closes CVE-2026-15711, high severity)
- CVEs: 15, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:4703-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libsoup2](https://patchblox.com/security/data/product/linux/libsoup2.md) | sles 15.6 | 2.74.3-150600.4.42.1 |
| [libsoup2](https://patchblox.com/security/data/product/linux/libsoup2.md) | sles 15.7 | 2.74.3-150600.4.42.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-15711](https://patchblox.com/security/data/cve/CVE-2026-15711.md) | High | Libsoup: soupwebsocketconnection: libsoup: websocket remote denial of service via oversized control frame protocol violation | 7.5 | 0.0075 |  |
| [CVE-2026-102559](https://patchblox.com/security/data/cve/CVE-2026-102559.md) | High | Libsoup: libsoup: heap buffer overflow during websocket client-frame masking | 8.6 | 0.0063 |  |
| [CVE-2026-102558](https://patchblox.com/security/data/cve/CVE-2026-102558.md) | High | Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growth | 8.6 | 0.0060 |  |
| [CVE-2026-102560](https://patchblox.com/security/data/cve/CVE-2026-102560.md) | High | Libsoup: libsoup: heap buffer overflow during outgoing permessage-deflate buffer growth | 8.6 | 0.0052 |  |
| [CVE-2026-102556](https://patchblox.com/security/data/cve/CVE-2026-102556.md) | High | Libsoup: libsoup: heap buffer overflow from websocket pong signal type confusion | 8.6 | 0.0047 |  |
| [CVE-2026-102557](https://patchblox.com/security/data/cve/CVE-2026-102557.md) | High | Libsoup: libsoup: heap buffer overflow during websocket message reassembly | 8.6 | 0.0047 |  |
| [CVE-2026-77680](https://patchblox.com/security/data/cve/CVE-2026-77680.md) | Routine | libsoup2: quadratic CPU denial of service in HTTP Range coalescing after the CVE-2025-32907 fix (bsc#1276759). | n/a | 0.0050 |  |
| [CVE-2026-15714](https://patchblox.com/security/data/cve/CVE-2026-15714.md) | Routine | Libsoup: soupmultipartinputstream: libsoup: out-of-bounds read in soup_multipart_input_stream_read_headers via an oversized multipart boundary string | 6.5 | 0.0039 |  |
| [CVE-2026-15713](https://patchblox.com/security/data/cve/CVE-2026-15713.md) | Routine | Libsoup: soupcache: libsoup: http/2 frame window exhaustion remote denial of service via memory leak | 5.9 | 0.0035 |  |
| [CVE-2026-2708](https://patchblox.com/security/data/cve/CVE-2026-2708.md) | Routine | Libsoup: libsoup: http request smuggling via duplicate content-length headers | 3.7 | 0.0032 |  |
| [CVE-2026-12548](https://patchblox.com/security/data/cve/CVE-2026-12548.md) | Routine | gir1.2-soup-2.4: A heap out-of-bounds read flaw was found in libsoup | n/a | 0.0025 |  |
| [CVE-2026-66339](https://patchblox.com/security/data/cve/CVE-2026-66339.md) | Routine | libsoup: proxy credentials leak to destination server via `Proxy-Authorization` header in CONNECT tunnels | n/a | 0.0025 |  |
| [CVE-2026-103399](https://patchblox.com/security/data/cve/CVE-2026-103399.md) | Routine | Libsoup: soupserver: http/1 request smuggling via undrained expect: 100-continue body | 5.3 | 0.0025 |  |
| [CVE-2026-77014](https://patchblox.com/security/data/cve/CVE-2026-77014.md) | Routine | Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of http range responses | 5.3 | 0.0023 |  |
| [CVE-2026-12547](https://patchblox.com/security/data/cve/CVE-2026-12547.md) | Routine | Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch | 3.4 | 0.0023 |  |

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Data as of 2026-11-11T01:43:54Z 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

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