# CVE-2026-2708: Libsoup: libsoup: http request smuggling via duplicate content-length headers

CVE-2026-2708 is fixed in 7 products on 1 platform, first by SUSE-SU-2026:0657-1, released February 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-2708
- Priority: Routine
- CVSS: 3.7 (Low)
- EPSS: 0.0032
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2026
- Weakness: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-2708

## Description

This update for libsoup fixes the following issues:  - CVE-2026-15713: SoupCache: libsoup: HTTP/2 frame window exhaustion remote denial of service via memory leak   (bsc#1271448). - CVE-2026-102555: Heap buffer overflow via uninitialized length in data-URI base64 decoding (bsc#1283299). - CVE-2026-102556: Heap buffer overflow from WebSocket Pong signal type confusion (bsc#1283300). - CVE-2026-102557: Heap buffer overflow during WebSocket message reassembly (bsc#1283301). - CVE-2026-102558: Heap buffer overflow during WebSocket receive-buffer growth (bsc#1283302). - CVE-2026-102559: Heap buffer overflow during WebSocket client-frame masking (bsc#1283303). - CVE-2026-102560: Heap buffer overflow during outgoing permessage-deflate buffer growth (bsc#1283304).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libsoup opensuse-leap 15.6 | 3.4.4-150600.3.34.1 | [SUSE-SU-2026:0690-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0690-1.md) | Feb 27, 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 sles 15.6 | 3.4.4-150600.3.59.1 | [SUSE-SU-2026:4631-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4631-1.md) | Nov 7, 2026 |
| Linux | libsoup sles 15.6 | 3.4.4-150600.3.34.1 | [SUSE-SU-2026:0690-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0690-1.md) | Feb 27, 2026 |
| Linux | libsoup sles 15.7 | 3.4.4-150600.3.59.1 | [SUSE-SU-2026:4631-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4631-1.md) | Nov 7, 2026 |
| Linux | libsoup sles 15.7 | 3.4.4-150600.3.34.1 | [SUSE-SU-2026:0690-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0690-1.md) | Feb 27, 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 | libsoup2 opensuse-leap 15.6 | 2.74.3-150600.4.27.1 | [SUSE-SU-2026:0657-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0657-1.md) | Feb 26, 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 | 2.74.3-150600.4.42.1 | [SUSE-SU-2026:4703-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4703-1.md) | Nov 7, 2026 |
| Linux | libsoup2 sles 15.6 | 2.74.3-150600.4.27.1 | [SUSE-SU-2026:0657-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0657-1.md) | Feb 26, 2026 |
| Linux | libsoup2 sles 15.7 | 2.74.3-150600.4.42.1 | [SUSE-SU-2026:4703-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4703-1.md) | Nov 7, 2026 |
| Linux | libsoup2 sles 15.7 | 2.74.3-150600.4.27.1 | [SUSE-SU-2026:0657-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0657-1.md) | Feb 26, 2026 |
| Linux | libsoup3 amzn 2023 | 3.6.6-58.amzn2023 | [ALAS2023-2026-1778](https://patchblox.com/security/data/fix/linux/alas2023-2026-1778.md) | Jun 8, 2026 |
| Linux | libsoup3-debuginfo amzn 2023 | 3.6.6-58.amzn2023 | [ALAS2023-2026-1778](https://patchblox.com/security/data/fix/linux/alas2023-2026-1778.md) | Jun 8, 2026 |
| Linux | libsoup3-debugsource amzn 2023 | 3.6.6-58.amzn2023 | [ALAS2023-2026-1778](https://patchblox.com/security/data/fix/linux/alas2023-2026-1778.md) | Jun 8, 2026 |
| Linux | libsoup3-devel amzn 2023 | 3.6.6-58.amzn2023 | [ALAS2023-2026-1778](https://patchblox.com/security/data/fix/linux/alas2023-2026-1778.md) | Jun 8, 2026 |
| Linux | libsoup3-doc amzn 2023 | 3.6.6-58.amzn2023 | [ALAS2023-2026-1778](https://patchblox.com/security/data/fix/linux/alas2023-2026-1778.md) | Jun 8, 2026 |

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Data as of 2026-11-10T07:50:38Z 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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