Advisory USN-8890-1, published in the Ubuntu Security feed on October 6, 2026, covers several vulnerabilities in the libsoup library, used by applications that make HTTP requests. According to the text, the flaws may allow denial of service, exposure of confidential information, bypass of security controls and, in one case, arbitrary code execution. The issues involve HTTP/2 requests, HTTPS proxy connections, chunked HTTP requests, proxy authentication credentials, HTTP Range headers and HTTP/2 transfers. The identifiers cited are CVE-2026-4271, CVE-2026-5119, CVE-2026-6324, CVE-2026-66339, CVE-2026-77014, CVE-2026-77680, CVE-2026-85197 and CVE-2026-85534. Some items affect only Ubuntu 22.04 LTS, 24.04 LTS or 26.04 LTS, as indicated for each flaw. The advisory states that fixes exist for several Ubuntu versions. Because the text is a machine translation of the feed, consult the original notice on the Ubuntu security notices page before making technical decisions.
Cyber ·
Radar: advisory USN-8890-1 on libsoup vulnerabilities
Ubuntu Security advisory with fixes for libsoup flaws that can cause denial of service, information exposure and bypass of controls, published on October 6, 2026.
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