# CVE-2026-44889: WebOb: Location header normalization during redirect leads to open redirect CVE-2026-44889 is fixed in 9 products on 1 platform, first by python-webob 1:1.7.3-2ubuntu0.1~esm2, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-44889 - Priority: Routine - CVSS: 6.1 (Moderate) - EPSS: 0.0027 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 22, 2026 - Weakness: URL Redirection to Untrusted Site ('Open Redirect') - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44889 ## Description WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips ASCII tab, carriage return, and newline characters before parsing, so a redirect target containing such characters can be reinterpreted as a protocol-relative URL whose authority is an attacker-controlled host. This bypasses the CVE-2024-42353 fix that escaped a leading double slash, allowing an attacker who influences the redirect location to send users to an arbitrary external site instead of the intended one. This vulnerability is fixed in 1.8.10. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | python-Markdown opensuse-leap 16.0 | 3.8.2-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-Markdown sles 16.0 | 3.8.2-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-PyGithub opensuse-leap 16.0 | 2.6.1-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-PyGithub sles 16.0 | 2.6.1-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-WebOb opensuse-leap 16.0 | 1.8.9-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-WebOb sles 15.7 | 1.7.4-150000.3.6.1 | [SUSE-SU-2026:2982-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2982-1.md) | Jul 14, 2026 | | Linux | python-WebOb sles 16.0 | 1.8.9-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-apache-libcloud opensuse-leap 16.0 | 3.8.0-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-apache-libcloud sles 16.0 | 3.8.0-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-handy-archives opensuse-leap 16.0 | 0.2.0-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-handy-archives sles 16.0 | 0.2.0-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-joblib opensuse-leap 16.0 | 1.5.2-160000.1.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-soupsieve opensuse-leap 16.0 | 2.6-160000.3.1 | [OPENSUSE-SU-2026:21063-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21063-1.md) | Jun 26, 2026 | | Linux | python-soupsieve sles 16.0 | 2.6-160000.3.1 | [SUSE-SU-2026:22370-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22370-1.md) | Jun 26, 2026 | | Linux | python-webob Debian 13.5 (trixie) | 1:1.8.10-0+deb13u1 | [DEBIAN-CVE-2026-44889](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44889.md) | Jul 6, 2026 | | Linux | python-webob Debian 14 | 1:1.8.10-1 | [DEBIAN-CVE-2026-44889](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44889.md) | Jul 6, 2026 | | Linux | python-webob Ubuntu 18.04.6 LTS (bionic) | 1:1.7.3-2ubuntu0.1~esm2 | [python-webob 1:1.7.3-2ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-webob-1-1.7.3-2ubuntu0.1-esm2.md) | Jun 22, 2026 | | Linux | python3-webob Ubuntu 18.04.6 LTS (bionic) | 1:1.7.3-2ubuntu0.1~esm2 | [python3-webob 1:1.7.3-2ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-webob-1-1.7.3-2ubuntu0.1-esm2.md) | Jun 22, 2026 | | Linux | python3-webob Ubuntu 20.04 LTS (focal) | 1:1.8.5-2ubuntu0.1+esm1 | [python3-webob 1:1.8.5-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-webob-1-1.8.5-2ubuntu0.1-esm1.md) | Jun 22, 2026 | | Linux | python3-webob Ubuntu 22.04.1 LTS (jammy) | 1:1.8.6-1.1ubuntu0.2 | [python3-webob 1:1.8.6-1.1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-webob-1-1.8.6-1.1ubuntu0.2.md) | Jun 22, 2026 | | Linux | python3-webob Ubuntu 24.04.5 LTS (noble) | 1:1.8.7-1ubuntu0.1.24.04.2 | [python3-webob 1:1.8.7-1ubuntu0.1.24.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-webob-1-1.8.7-1ubuntu0.1.24.04.2.md) | Jun 22, 2026 | | Linux | python3-webob Ubuntu 26.04.1 LTS (resolute) | 1:1.8.9-1ubuntu0.1 | [python3-webob 1:1.8.9-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-webob-1-1.8.9-1ubuntu0.1.md) | Jun 22, 2026 | --- Data as of 2026-11-08T19:12:23Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.