{"affected":[{"defaultStatus":"unaffected","product":"stunnel","source":"CNA: redhat","vendor":"Mobi-Com Polska Sp. z o.o.","versions":[{"lessThan":"5.80","status":"affected","version":"5.68","versionType":"custom"}]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"stunnel","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"stunnel","product":"Red Hat Enterprise Linux 6","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"stunnel","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"stunnel","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"stunnel","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-70368","cwes":["CWE-125"],"description":"A stack-based out-of-bounds read vulnerability exists in the \"s_vlog\" function of stunnel, when handling oversized log messages via \"vsnprintf\". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing \"\\n\" characters with \"\\0\".","epss":{"date":"2026-11-05","percentile":0.29105,"score":0.00353},"exploits":[],"kev":null,"metrics":[{"score":6.5,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}],"modifiedAt":1793919115471,"publishedAt":1785851545255,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-70368"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462029"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"To mitigate this issue, avoid exposing stunnel services to untrusted clients. Restrict access to these services to trusted networks only."}],"revision":"16f9922ed106fa68ac29be941b6c5862e8bcd75d63f84288956cabc7f791435b","sources":[{"modifiedAt":1793919115471,"name":"CNA: redhat","retrievedAt":1793920156842,"url":"https://www.cve.org/CVERecord?id=CVE-2026-70368"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793920183164,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-70368"}],"ssvc":{"assessedAt":1785853277494,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message","updatedAt":1793920183164}