{"id":"CVE-2026-87861","aliases":["ALPINE-CVE-2026-87861","BELL-CVE-2026-87861","CURL-CVE-2026-87861","DEBIAN-CVE-2026-87861","EUVD-2026-105308","GHSA-34qg-cqjx-hpwx","MGASA-2026-0515","RHSA-2026:82895","SUSE-SU-2026:5068-1","SUSE-SU-2026:5069-1","openSUSE-SU-2026:12150-1"],"status":"published","title":"cross-origin reuse of a Negotiate connection","description":"When using ambient user credentials, an HTTP request directed to one origin\nmay be dispatched over a connection previously authenticated via Negotiate for\na different origin, leaving the request's intended credentials unused.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00676,"percentile":0.52745,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-201"],"published":"2026-10-14T08:00:00Z","modified":"2026-11-03T22:45:05Z","fixes":[{"ecosystem":"Alpine:v3.23","package":"curl","fixed_in":["8.23.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"curl","fixed_in":["8.23.0-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:23","package":"curl","fixed_in":["8.23.0-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"curl","fixed_in":["8.23.0-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"curl","fixed_in":["8.23.0-r0"],"sources":["osv"]},{"ecosystem":"BellSoft Hardened 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unused.","status":"published","published":"2026-10-14T08:00:00Z","modified":"2026-10-25T01:05:14.17449199Z","updated_at":"2026-11-02T15:43:55.998148Z"},{"id":"MGASA-2026-0515","title":"Updated curl package fixes security vulnerabilities","description":"curl 8.23.0 has been released. It fixes 24 CVEs since 8.22.0, listed at\nhttps://curl.se/docs/security.html\nNot all of theses CVEs affect Mageia. Of the ones fixed in 8.23.0, these\nare the ones that do:\nCVE-2026-86410: redirect to SFTP or SCP bypasses host verification\nCVE-2026-86412: server-set cookie erases cookie jar\nCVE-2026-86413: Negotiate credentials sent to redirected origin\nCVE-2026-86414: leaking host credentials to HTTP proxy\nCVE-2026-86415: auto client cert connection reuse mixup\nCVE-2026-87861: cross-origin reuse of a Negotiate connection\nCVE-2026-87862: HSTS cache import drops longer-lived child\nCVE-2026-87863: HSTS response erases persisted entries\nCVE-2026-92386: server-set cookie aborts cookie jar load\nCVE-2026-92387: never-ending loop via server response omission\nCVE-2026-92388: FTP wildcard write callback mixup\nCVE-2026-92389: TFTP direction confusion\nCVE-2026-92390: -J no-clobber guarantee bypassed with 103 early hints\nCVE-2026-92391: curl_mime_free stack overflow by recursion\nCVE-2026-92392: HTTP/2 upload Use-After-Free\nCVE-2026-94265: Authorization: Negotiate sent to foreign origin\nCVE-2026-94266: password leak in CURLINFO_EFFECTIVE_URL\nCVE-2026-107929: local interface connection reuse mixup\nThere were also some CVE IDs released at the same time that were fixed\nearlier, in 8.22.0, but just announced now:\nCVE-2026-86409: stale SigV4 headers sent unintended\nCVE-2026-86411: FTP connection reuse inherits client-certificate\nCVE-2026-87864: IMAP APPEND plus CRLF conversion command injection\nHere are the CVEs fixed in 8.22.0, which wasn't released in mga10 and so\nare only getting fixed now:\nCVE-2026-13608: OpenLDAP SASL authentication bypass\nCVE-2026-18924: HTTP/2 server push UAF\nCVE-2026-19931: Negotiate ambient user conn reuse\nCVE-2026-80229: OpenSSL provider use-after-free\nCVE-2026-80230: OpenSSL pinning bypass\nCVE-2026-80255: secure cookie attribute bypass with tab\nCVE-2026-82209: domain-scoped PSL domain cookie\n","status":"published","published":"2026-10-17T03:21:49Z","modified":"2026-10-17T03:43:01.411193688Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:12150-1","title":"curl-8.23.0-1.1 on GA media","description":"These are all security issues fixed in the curl-8.23.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-16T00:00:00Z","modified":"2026-10-17T10:00:05.085098051Z","updated_at":"2026-11-02T16:58:40.245664Z"},{"id":"SUSE-SU-2026:5068-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\n- CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414).\n- CVE-2026-9546: sending old referer (bsc#1268419).\n- CVE-2026-11352: QUIC zero-length UDP datagrams busy-loop (bsc#1268423).\n- CVE-2026-11564: Native CA trust persist (bsc#1268424).\n- CVE-2026-11586: WS Auto-PONG memory exhaustion (bsc#1268425).\n- CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426).\n- CVE-2026-12064: proto-default skips SSH verification (bsc#1268427).\n- CVE-2026-18924: HTTP/2 server push UAF (bsc#1277477).\n- CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478).\n- CVE-2026-80255: secure cookie attribute bypass with tab (bsc#1277482).\n- CVE-2026-82209: domain-scoped PSL domain cookie (bsc#1278173).\n- CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031).\n- CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030).\n- CVE-2026-86411: FTP connection reuse inherits client-certificate (bsc#1285029).\n- CVE-2026-86412: server-set cookie erases cookie jar (bsc#1285028).\n- CVE-2026-86413: Negotiate credentials sent to redirected origin (bsc#1285027).\n- CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026).\n- CVE-2026-87861: cross-origin reuse of a Negotiate connection (bsc#1285024).\n- CVE-2026-87862: HSTS cache import drops longer-lived child (bsc#1285023).\n- CVE-2026-87863: HSTS response erases persisted entries (bsc#1285022).\n- CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021).\n- CVE-2026-92386: server-set cookie aborts cookie jar load (bsc#1285018).\n- CVE-2026-92387: never-ending loop via server response omission (bsc#1285017).\n- CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016).\n- CVE-2026-92389: TFTP direction confusion (bsc#1285015).\n- CVE-2026-92390: -J no-clobber guarantee bypassed with 103 early hints (bsc#1285014).\n- CVE-2026-92391: curl_mime_free stack overflow by recursion (bsc#1285013).\n- CVE-2026-92392: HTTP/2 upload Use-After-Free (bsc#1285012).\n- CVE-2026-94265: Authorization: Negotiate sent to foreign origin (bsc#1285011).\n- CVE-2026-94266: password leak in CURLINFO_EFFECTIVE_URL (bsc#1285010).\n- CVE-2026-107929: local interface connection reuse mixup (bsc#1285008).\n  \nChanges for curl:\n\n- Updated curl to version 8.22.0. (jsc#PED-16984)\n","status":"published","published":"2026-11-03T08:13:17Z","modified":"2026-11-03T22:45:04.218292646Z","updated_at":"2026-11-03T22:59:30.419462Z"},{"id":"SUSE-SU-2026:5069-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\n- CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414).\n- CVE-2026-9546: sending old referer (bsc#1268419).\n- CVE-2026-11352: QUIC zero-length UDP datagrams busy-loop (bsc#1268423).\n- CVE-2026-11564: Native CA trust persist (bsc#1268424).\n- CVE-2026-11586: WS Auto-PONG memory exhaustion (bsc#1268425).\n- CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426).\n- CVE-2026-12064: proto-default skips SSH verification (bsc#1268427).\n- CVE-2026-18924: HTTP/2 server push UAF (bsc#1277477).\n- CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478).\n- CVE-2026-80255: secure cookie attribute bypass with tab (bsc#1277482).\n- CVE-2026-82209: domain-scoped PSL domain cookie (bsc#1278173).\n- CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031).\n- CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030).\n- CVE-2026-86411: FTP connection reuse inherits client-certificate (bsc#1285029).\n- CVE-2026-86412: server-set cookie erases cookie jar (bsc#1285028).\n- CVE-2026-86413: Negotiate credentials sent to redirected origin (bsc#1285027).\n- CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026).\n- CVE-2026-87861: cross-origin reuse of a Negotiate connection (bsc#1285024).\n- CVE-2026-87862: HSTS cache import drops longer-lived child (bsc#1285023).\n- CVE-2026-87863: HSTS response erases persisted entries (bsc#1285022).\n- CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021).\n- CVE-2026-92386: server-set cookie aborts cookie jar load (bsc#1285018).\n- CVE-2026-92387: never-ending loop via server response omission (bsc#1285017).\n- CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016).\n- CVE-2026-92389: TFTP direction confusion (bsc#1285015).\n- CVE-2026-92390: -J no-clobber guarantee bypassed with 103 early hints (bsc#1285014).\n- CVE-2026-92391: curl_mime_free stack overflow by recursion (bsc#1285013).\n- CVE-2026-92392: HTTP/2 upload Use-After-Free (bsc#1285012).\n- CVE-2026-94265: Authorization: Negotiate sent to foreign origin (bsc#1285011).\n- CVE-2026-94266: password leak in CURLINFO_EFFECTIVE_URL (bsc#1285010).\n- CVE-2026-107929: local interface connection reuse mixup (bsc#1285008).\n\nChanges for curl:\n\n- Updated to version 8.22.0. (jsc#PED-16984)\n","status":"published","published":"2026-11-03T08:13:44Z","modified":"2026-11-03T22:45:05.964085219Z","updated_at":"2026-11-03T22:59:30.419462Z"}]}}