{"id":"CVE-2026-102556","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102556","generatedAt":"2026-10-28T01:53:19.333Z","title":"Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.","description":"A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.","published":"2026-09-29T17:17:06.000Z","lastModified":"2026-10-19T05:17:04.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"cwe":["CWE-843"],"affected":["gnome/libsoup","redhat/enterprise linux"],"epss":{"score":0.00274,"percentile":0.19574,"date":"2026-10-26","history":[{"date":"2026-09-30","score":0.0022,"percentile":0.11334}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T17:17:06.000Z","detail":{"score":"8.6","severity":"HIGH","publishedAt":"2026-09-29T17:17:06.460Z"},"summary":"New CVE, high severity (CVSS 8.6)."}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:83384","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83618","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:84586","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102556","tags":["Mitigation","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543229","tags":["Issue Tracking","Vendor Advisory"],"source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102556","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}