{"id":"CVE-2026-8286","summary":"wrong STARTTLS connection reuse","details":"A vulnerability exists where a new transfer that uses STARTTLS to upgrade the\nconnection might reuse an existing live connection even though the TLS\nconfiguration mismatches so it should not.","aliases":["CURL-CVE-2026-8286"],"modified":"2026-09-17T03:30:57.291096554Z","published":"2026-07-03T06:14:17.541Z","related":["ALSA-2026:55439","ALSA-2026:57462","SUSE-SU-2026:22553-1","SUSE-SU-2026:22582-1","SUSE-SU-2026:22709-1","SUSE-SU-2026:22889-1","SUSE-SU-2026:2925-1","SUSE-SU-2026:2926-1","SUSE-SU-2026:3043-1","SUSE-SU-2026:3814-1","openSUSE-SU-2026:11230-1","openSUSE-SU-2026:21272-1"],"database_specific":{"cna_assigner":"curl","cwe_ids":["CWE-295"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8286.json","unresolved_ranges":[{"extracted_events":[{"introduced":"7.30.0"},{"fixed":"8.14.2"},{"introduced":"8.15.0"},{"fixed":"8.16.1"},{"introduced":"8.17.0"},{"fixed":"8.20.1"},{"introduced":"a1701eea289fe7ea80651f801cf992838a491dde"},{"fixed":"a86efdd7ca5433de9231e650f18247de8319ad16"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8286.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8286.json"},{"type":"WEB","url":"https://hackerone.com/reports/3718195"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8286.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8286"},{"type":"PACKAGE","url":"https://github.com/curl/curl.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"6e3f8dc1f173b47de9a68516ce4b95bf25598c2f"},{"fixed":"3f00a2f6fa97f7721b65606954aac979dcb6caac"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.20.0"},{"last_affected":"8.20.0"},{"introduced":"8.19.0"},{"last_affected":"8.19.0"},{"introduced":"8.18.0"},{"last_affected":"8.18.0"},{"introduced":"8.17.0"},{"last_affected":"8.17.0"},{"introduced":"8.16.0"},{"last_affected":"8.16.0"},{"introduced":"8.15.0"},{"last_affected":"8.15.0"},{"introduced":"8.14.1"},{"last_affected":"8.14.1"},{"introduced":"8.14.0"},{"last_affected":"8.14.0"},{"introduced":"8.13.0"},{"last_affected":"8.13.0"},{"introduced":"8.12.1"},{"last_affected":"8.12.1"},{"introduced":"8.12.0"},{"last_affected":"8.12.0"},{"introduced":"8.11.1"},{"last_affected":"8.11.1"},{"introduced":"8.11.0"},{"last_affected":"8.11.0"},{"introduced":"8.10.1"},{"last_affected":"8.10.1"},{"introduced":"8.10.0"},{"last_affected":"8.10.0"},{"introduced":"8.9.1"},{"last_affected":"8.9.1"},{"introduced":"8.9.0"},{"last_affected":"8.9.0"},{"introduced":"8.8.0"},{"last_affected":"8.8.0"},{"introduced":"8.7.1"},{"last_affected":"8.7.1"},{"introduced":"8.7.0"},{"last_affected":"8.7.0"},{"introduced":"8.6.0"},{"last_affected":"8.6.0"},{"introduced":"8.5.0"},{"last_affected":"8.5.0"},{"introduced":"8.4.0"},{"last_affected":"8.4.0"},{"introduced":"8.3.0"},{"last_affected":"8.3.0"},{"introduced":"8.2.1"},{"last_affected":"8.2.1"},{"introduced":"8.2.0"},{"last_affected":"8.2.0"},{"introduced":"8.1.2"},{"last_affected":"8.1.2"},{"introduced":"8.1.1"},{"last_affected":"8.1.1"},{"introduced":"8.1.0"},{"last_affected":"8.1.0"},{"introduced":"8.0.1"},{"last_affected":"8.0.1"},{"introduced":"8.0.0"},{"last_affected":"8.0.0"},{"introduced":"7.88.1"},{"last_affected":"7.88.1"},{"introduced":"7.88.0"},{"last_affected":"7.88.0"},{"introduced":"7.87.0"},{"last_affected":"7.87.0"},{"introduced":"7.86.0"},{"last_affected":"7.86.0"},{"introduced":"7.85.0"},{"last_affected":"7.85.0"},{"introduced":"7.84.0"},{"last_affected":"7.84.0"},{"introduced":"7.83.1"},{"last_affected":"7.83.1"},{"introduced":"7.83.0"},{"last_affected":"7.83.0"},{"introduced":"7.82.0"},{"last_affected":"7.82.0"},{"introduced":"7.81.0"},{"last_affected":"7.81.0"},{"introduced":"7.80.0"},{"last_affected":"7.80.0"},{"introduced":"7.79.1"},{"last_affected":"7.79.1"},{"introduced":"7.79.0"},{"last_affected":"7.79.0"},{"introduced":"7.78.0"},{"last_affected":"7.78.0"},{"introduced":"7.77.0"},{"last_affected":"7.77.0"},{"introduced":"7.76.1"},{"last_affected":"7.76.1"},{"introduced":"7.76.0"},{"last_affected":"7.76.0"},{"introduced":"7.75.0"},{"last_affected":"7.75.0"},{"introduced":"7.74.0"},{"last_affected":"7.74.0"},{"introduced":"7.73.0"},{"last_affected":"7.73.0"},{"introduced":"7.72.0"},{"last_affected":"7.72.0"},{"introduced":"7.71.1"},{"last_affected":"7.71.1"},{"introduced":"7.71.0"},{"last_affected":"7.71.0"},{"introduced":"7.70.0"},{"last_affected":"7.70.0"},{"introduced":"7.69.1"},{"last_affected":"7.69.1"},{"introduced":"7.69.0"},{"last_affected":"7.69.0"},{"introduced":"7.68.0"},{"last_affected":"7.68.0"},{"introduced":"7.67.0"},{"last_affected":"7.67.0"},{"introduced":"7.66.0"},{"last_affected":"7.66.0"},{"introduced":"7.65.3"},{"last_affected":"7.65.3"},{"introduced":"7.65.2"},{"last_affected":"7.65.2"},{"introduced":"7.65.1"},{"last_affected":"7.65.1"},{"introduced":"7.65.0"},{"last_affected":"7.65.0"},{"introduced":"7.64.1"},{"last_affected":"7.64.1"},{"introduced":"7.64.0"},{"last_affected":"7.64.0"},{"intro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