# CVE-2026-1801: gir1.2-soup-2.4: A flaw was found in libsoup, an HTTP client/server library CVE-2026-1801 is fixed in 22 products on 1 platform, first by gir1.2-soup-2.4 2.62.1-1ubuntu0.4+esm8, released February 3, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-1801 - Priority: Routine - CVSS: n/a (Medium) - EPSS: 0.0042 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 3, 2026 ## Description A flaw was found in libsoup, an HTTP client/server library. This HTTP Request Smuggling vulnerability arises from non-RFC-compliant parsing in the soup_filter_input_stream_read_line() logic, where libsoup accepts malformed chunk headers, such as lone line feed (LF) characters instead of the required carriage return and line feed (CRLF). A remote attacker can exploit this without authentication or user interaction by sending specially crafted chunked requests. This allows libsoup to parse and process multiple HTTP requests from a single network message, potentially leading to information disclosure. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gir1.2-soup-2.4 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm8 | [gir1.2-soup-2.4 2.62.1-1ubuntu0.4+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gir1.2-soup-2.4-2.62.1-1ubuntu0.4-esm8.md) | Feb 3, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm3 | [gir1.2-soup-2.4 2.70.0-1ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-soup-2.4-2.70.0-1ubuntu0.5-esm3.md) | Feb 3, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.8 | [gir1.2-soup-2.4 2.74.2-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-soup-2.4-2.74.2-3ubuntu0.8.md) | Feb 3, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.8 | [gir1.2-soup-2.4 2.74.3-6ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-soup-2.4-2.74.3-6ubuntu1.8.md) | Feb 3, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm2 | [gir1.2-soup-2.4 2.74.3-10.1ubuntu5+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-soup-2.4-2.74.3-10.1ubuntu5-esm2.md) | Feb 3, 2026 | | Linux | gir1.2-soup-3.0 Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm8 | [gir1.2-soup-3.0 3.0.7-0ubuntu1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-soup-3.0-3.0.7-0ubuntu1-esm8.md) | Feb 3, 2026 | | Linux | gir1.2-soup-3.0 Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.8 | [gir1.2-soup-3.0 3.4.4-5ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-soup-3.0-3.4.4-5ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup amzn 2023 | 2.72.0-6.amzn2023.0.12 | [ALAS2023-2026-1758](https://patchblox.com/security/data/fix/linux/alas2023-2026-1758.md) | May 25, 2026 | | Linux | libsoup sles 15.6 | 3.4.4-150600.3.47.1 | [SUSE-SU-2026:2314-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2314-1.md) | Jun 9, 2026 | | Linux | libsoup sles 15.7 | 3.4.4-150600.3.47.1 | [SUSE-SU-2026:2314-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2314-1.md) | Jun 9, 2026 | | Linux | libsoup-2.4-1 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.8 | [libsoup-2.4-1 2.74.3-6ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-2.4-1-2.74.3-6ubuntu1.8.md) | Feb 3, 2026 | | Linux | libsoup-2.4-1 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm2 | [libsoup-2.4-1 2.74.3-10.1ubuntu5+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-2.4-1-2.74.3-10.1ubuntu5-esm2.md) | Feb 3, 2026 | | Linux | libsoup-3.0-0 Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm8 | [libsoup-3.0-0 3.0.7-0ubuntu1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-0-3.0.7-0ubuntu1-esm8.md) | Feb 3, 2026 | | Linux | libsoup-3.0-0 Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.8 | [libsoup-3.0-0 3.4.4-5ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-0-3.4.4-5ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup-3.0-common Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm8 | [libsoup-3.0-common 3.0.7-0ubuntu1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-common-3.0.7-0ubuntu1-esm8.md) | Feb 3, 2026 | | Linux | libsoup-3.0-common Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.8 | [libsoup-3.0-common 3.4.4-5ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-common-3.4.4-5ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup-3.0-tests Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm8 | [libsoup-3.0-tests 3.0.7-0ubuntu1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-tests-3.0.7-0ubuntu1-esm8.md) | Feb 3, 2026 | | Linux | libsoup-3.0-tests Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.8 | [libsoup-3.0-tests 3.4.4-5ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-tests-3.4.4-5ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup-debuginfo amzn 2023 | 2.72.0-6.amzn2023.0.12 | [ALAS2023-2026-1758](https://patchblox.com/security/data/fix/linux/alas2023-2026-1758.md) | May 25, 2026 | | Linux | libsoup-debugsource amzn 2023 | 2.72.0-6.amzn2023.0.12 | [ALAS2023-2026-1758](https://patchblox.com/security/data/fix/linux/alas2023-2026-1758.md) | May 25, 2026 | | Linux | libsoup-devel amzn 2023 | 2.72.0-6.amzn2023.0.12 | [ALAS2023-2026-1758](https://patchblox.com/security/data/fix/linux/alas2023-2026-1758.md) | May 25, 2026 | | Linux | libsoup-doc amzn 2023 | 2.72.0-6.amzn2023.0.12 | [ALAS2023-2026-1758](https://patchblox.com/security/data/fix/linux/alas2023-2026-1758.md) | May 25, 2026 | | Linux | libsoup-gnome-2.4-1 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.8 | [libsoup-gnome-2.4-1 2.74.3-6ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-gnome-2.4-1-2.74.3-6ubuntu1.8.md) | Feb 3, 2026 | | Linux | libsoup-gnome-2.4-1 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm2 | [libsoup-gnome-2.4-1 2.74.3-10.1ubuntu5+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-gnome-2.4-1-2.74.3-10.1ubuntu5-esm2.md) | Feb 3, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm8 | [libsoup-gnome2.4-1 2.62.1-1ubuntu0.4+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsoup-gnome2.4-1-2.62.1-1ubuntu0.4-esm8.md) | Feb 3, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm3 | [libsoup-gnome2.4-1 2.70.0-1ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup-gnome2.4-1-2.70.0-1ubuntu0.5-esm3.md) | Feb 3, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.8 | [libsoup-gnome2.4-1 2.74.2-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-gnome2.4-1-2.74.2-3ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup2 sles 15.7 | 2.74.3-150600.4.36.1 | [SUSE-SU-2026:2654-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2654-1.md) | Jun 26, 2026 | | Linux | libsoup2.4-1 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm8 | [libsoup2.4-1 2.62.1-1ubuntu0.4+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsoup2.4-1-2.62.1-1ubuntu0.4-esm8.md) | Feb 3, 2026 | | Linux | libsoup2.4-1 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm3 | [libsoup2.4-1 2.70.0-1ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup2.4-1-2.70.0-1ubuntu0.5-esm3.md) | Feb 3, 2026 | | Linux | libsoup2.4-1 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.8 | [libsoup2.4-1 2.74.2-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-1-2.74.2-3ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup2.4-common Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.8 | [libsoup2.4-common 2.74.2-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-common-2.74.2-3ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup2.4-common Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.8 | [libsoup2.4-common 2.74.3-6ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup2.4-common-2.74.3-6ubuntu1.8.md) | Feb 3, 2026 | | Linux | libsoup2.4-common Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm2 | [libsoup2.4-common 2.74.3-10.1ubuntu5+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup2.4-common-2.74.3-10.1ubuntu5-esm2.md) | Feb 3, 2026 | | Linux | libsoup2.4-tests Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm3 | [libsoup2.4-tests 2.70.0-1ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup2.4-tests-2.70.0-1ubuntu0.5-esm3.md) | Feb 3, 2026 | | Linux | libsoup2.4-tests Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.8 | [libsoup2.4-tests 2.74.2-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-tests-2.74.2-3ubuntu0.8.md) | Feb 3, 2026 | | Linux | libsoup2.4-tests Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.8 | [libsoup2.4-tests 2.74.3-6ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup2.4-tests-2.74.3-6ubuntu1.8.md) | Feb 3, 2026 | | Linux | libsoup2.4-tests Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm2 | [libsoup2.4-tests 2.74.3-10.1ubuntu5+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup2.4-tests-2.74.3-10.1ubuntu5-esm2.md) | Feb 3, 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 | --- Data as of 2026-11-08T00:53:09Z UTC. 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