{"id":"OESA-2026-4391","summary":"libsoup security update","details":"libsoup is an HTTP client/server library for GNOME. It uses GObjects and the glib main loop, to integrate well with GNOME applications, and also has a synchronous API, for use in threaded applications.\r\n\r\nSecurity Fix(es):\n\nSoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.(CVE-2026-12547)\n\nA flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.(CVE-2026-66337)\n\nA flaw was found in libsoup. The chunked transfer encoding parser uses a permissive parsing function for chunk sizes that silently accepts inputs violating RFC 9112, including leading whitespace, plus sign prefixes, and trailing invalid characters. When libsoup operates behind a strict frontend proxy, this parsing differential can be exploited to smuggle HTTP requests.(CVE-2026-66338)","modified":"2026-10-16T12:15:13.689534088Z","published":"2026-10-16T12:00:06Z","upstream":["CVE-2026-12547","CVE-2026-66337","CVE-2026-66338"],"database_specific":{"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4391"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12547"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66337"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66338"}],"affected":[{"package":{"name":"libsoup","ecosystem":"openEuler:24.03-LTS-SP4","purl":"pkg:rpm/openEuler/libsoup&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.74.3-29.oe2403sp4"}]}],"ecosystem_specific":{"noarch":["libsoup-help-2.74.3-29.oe2403sp4.noarch.rpm"],"src":["libsoup-2.74.3-29.oe2403sp4.src.rpm"],"x86_64":["libsoup-2.74.3-29.oe2403sp4.x86_64.rpm","libsoup-debuginfo-2.74.3-29.oe2403sp4.x86_64.rpm","libsoup-debugsource-2.74.3-29.oe2403sp4.x86_64.rpm","libsoup-devel-2.74.3-29.oe2403sp4.x86_64.rpm"],"aarch64":["libsoup-2.74.3-29.oe2403sp4.aarch64.rpm","libsoup-debuginfo-2.74.3-29.oe2403sp4.aarch64.rpm","libsoup-debugsource-2.74.3-29.oe2403sp4.aarch64.rpm","libsoup-devel-2.74.3-29.oe2403sp4.aarch64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4391.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}