{"id":"CVE-2026-5773","summary":"wrong reuse of SMB connection","details":"libcurl might in some circumstances reuse the wrong connection for SMB(S)\ntransfers.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a network transfer operation that was requested by an\napplication could wrongfully reuse an existing SMB connection to the same\nserver that was using a different \"share\" than the new subsequent transfer\nshould.\n\nThis could in unlucky situations lead to the download of the wrong file or the\nupload of a file to the wrong place. When this happens, the same credentials\nare used and the server name is the same.","aliases":["CURL-CVE-2026-5773"],"modified":"2026-09-18T03:33:25.544319044Z","published":"2026-05-13T08:27:42.342Z","related":["SUSE-SU-2026:23350-1","SUSE-SU-2026:23361-1","SUSE-SU-2026:23498-1","SUSE-SU-2026:2703-1","SUSE-SU-2026:3798-1","SUSE-SU-2026:3958-1","SUSE-SU-2026:4047-1","openSUSE-SU-2026:10674-1","openSUSE-SU-2026:21774-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"7.40.0"},{"fixed":"8.14.2"},{"introduced":"8.15.0"},{"fixed":"8.16.1"},{"introduced":"aec2e865f06669b9cb5d26cc1148d70bc418b163"},{"fixed":"74a169575d6412dc0ff532acdf94de35a6c2a571"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"curl","cwe_ids":["CWE-488"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5773.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/29/9"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-5773.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-5773.json"},{"type":"WEB","url":"https://hackerone.com/reports/3650689"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5773.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5773"},{"type":"PACKAGE","url":"https://github.com/curl/curl.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"9ce2d7001939b795b45a8ce7700d1a3dcde0475d"},{"fixed":"a05f34973e6c4bb629d018f7cb51487be1c904d8"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"7.40.0"},{"fixed":"8.20.0"}]}}],"versions":["7.40.0","7.41.0","7.42.0","7.42.1","7.43.0","7.44.0","7.45.0","7.46.0","7.47.0","7.47.1","7.48.0","7.49.0","7.49.1","7.50.0","7.50.1","7.50.2","7.50.3","7.51.0","7.52.0","7.52.1","7.53.0","7.53.1","7.54.0","7.54.1","7.55.0","7.55.1","7.56.0","7.56.1","7.57.0","7.58.0","7.59.0","7.60.0","7.61.0","7.61.1","7.62.0","7.63.0","7.64.0","7.64.1","7.65.0","7.65.1","7.65.2","7.65.3","7.66.0","7.67.0","7.68.0","7.69.0","7.69.1","7.70.0","7.71.0","7.71.1","7.72.0","7.73.0","7.74.0","7.75.0","7.76.0","7.76.1","7.77.0","7.78.0","7.79.0","7.79.1","7.80.0","7.81.0","7.82.0","7.83.0","7.83.1","7.84.0","7.85.0","7.86.0","7.87.0","7.88.0","7.88.1","8.0.0","8.0.1","8.1.0","8.1.1","8.1.2","8.10.0","8.10.1","8.11.0","8.11.1","8.12.0","8.12.1","8.13.0","8.14.0","8.14.1","8.15.0","8.16.0","8.18.0","8.19.0","8.2.0","8.2.1","8.3.0","8.4.0","8.5.0","8.6.0","8.7.0","8.7.1","8.8.0","8.9.0","8.9.1","rc-8_20_0-3","rc-8_20_0-2","rc-8_20_0-1","curl-8_19_0","curl-8_18_0","curl-8_17_0","curl-8_16_0","curl-8_15_0","curl-8_14_1","curl-8_14_0","curl-8_13_0","curl-8_12_1","curl-8_12_0","curl-8_11_1","curl-8_11_0","curl-8_10_1","curl-8_10_0","curl-8_9_1","curl-8_9_0","curl-8_8_0","curl-8_7_1","curl-8_7_0","curl-8_6_0","curl-8_5_0","curl-8_4_0","curl-8_3_0","curl-8_2_1","curl-8_2_0","curl-8_1_2","curl-8_1_1","curl-8_1_0","curl-8_0_1","curl-8_0_0","curl-7_88_1","curl-7_88_0","curl-7_87_0","curl-7_86_0","curl-7_85_0","curl-7_84_0","curl-7_83_1","curl-7_83_0","curl-7_82_0","curl-7_81_0","curl-7_80_0","curl-7_79_1","curl-7_79_0","curl-7_78_0","curl-7_77_0","curl-7_76_1","curl-7_76_0","curl-7_75_0","curl-7_74_0","curl-7_73_0","curl-7_72_0","curl-7_71_1","curl-7_71_0","curl-7_70_0","curl-7_69_1","curl-7_69_0","curl-7_68_0","curl-7_67_0","curl-7_66_0","curl-7_65_3","curl-7_65_2","curl-7_65_1","curl-7_65_0","curl-7_64_1","curl-7_64_0","curl-7_63_0","curl-7_62_0","curl-7_61_1","curl-7_61_0","curl-7_60_0","curl-7_59_0","curl-7_58_0","curl-7_57_0","curl-7_56_1","curl-7_56_0","curl-7_55_1","curl-7_55_0","curl-7_54_1","curl-7_54_0","curl-7_53_1","curl-7_53_0","curl-7_52_1","curl-7_52_0","curl-7_51_0","curl-7_50_3","curl-7_50_2","curl-7_50_1","curl-7_50_0","curl-7_49_1","curl-7_49_0","curl-7_48_0","curl-7_47_1","curl-7_47_0","curl-7_46_0","curl-7_45_0","curl-7_44_0","curl-7_43_0","curl-7_42_0","curl-7_41_0","curl-7_40_0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-5773.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}