{"id":"CVE-2026-102557","title":"A flaw was found in libsoup","summary":"A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that c…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","cwe":["CWE-125"],"vendor":"Red Hat","product":"libsoup3","affected":["libsoup3 (all versions)","libsoup","libsoup (all versions)","libsoup (all versions)","libsoup (all versions)"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T17:17:06.600","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102557","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-102557","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543231","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-29T16:39:33.276Z","slug":"CVE-2026-102557","body":"## Overview\n\nA flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}