{"id":"CVE-2026-12548","title":"Libsoup: heap out-of-bounds read in libsoup due to integer truncation","summary":"A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap…","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Red Hat","product":"libsoup3","affected":["libsoup3 (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-23T14:19:42.070603Z"},"exploitAvailable":true,"published":"2026-07-21","updated":"2026-11-05","sourceUpdated":"2026-11-05T17:02:46.773Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-12548","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-12548"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2489996","label":"RHBZ#2489996"},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/work_items/512"}],"tags":["cve.org","exploit-available"],"epss":0.00254,"epssPercentile":0.17103,"ingestedAt":"2026-11-05T22:38:31.417Z","slug":"CVE-2026-12548","body":"## Overview\n\nA heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.\n\n## Affected\n\n- `libsoup3 (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":35,"depthScoreParts":{"impact":23.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}