MEDIUM 5.9 Microsoft
CVE-2025-9901
Libsoup: improper handling of http vary header in libsoup caching
Microsoft Security Update 2025-Sep: Libsoup: improper handling of http vary header in libsoup caching
Affected Products
- azl3 libsoup 3.4.4-9 on Azure Linux 3.0
- cbl2 libsoup 3.0.4-7 on CBL Mariner 2.0
- cbl2 libsoup 3.0.4-9 on CBL Mariner 2.0
- azl3 libsoup 3.4.4-10 on Azure Linux 3.0
- azl3 libsoup 3.4.4-12 on Azure Linux 3.0
- azl3 libsoup 3.4.4-14 on Azure Linux 3.0
- cbl2 libsoup 3.0.4-13 on CBL Mariner 2.0
- azl3 libsoup 3.4.4-16 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-9901
- https://nvd.nist.gov/vuln/detail/CVE-2025-9901
This medium severity vulnerability with a CVSS score of 5.9 was published on 2025-09-09 via Microsoft. Affected: azl3 libsoup 3.4.4-9 on Azure Linux 3.0, cbl2 libsoup 3.0.4-7 on CBL Mariner 2.0, cbl2 libsoup 3.0.4-9 on CBL Mariner 2.0 and 5 more.
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