{"schema_version":"1.7.5","id":"CURL-CVE-2018-1000007","published":"2018-01-24T08:00:00Z","modified":"2026-05-27T02:29:37.937481Z","aliases":["CVE-2018-1000007"],"summary":"HTTP authentication leak in redirects","details":"curl might leak authentication data to third parties.\n\nWhen asked to send custom headers in its HTTP requests, curl sends that set of\nheaders first to the host in the initial URL but also, if asked to follow\nredirects and a 30X HTTP response code is returned, to the host mentioned in\nURL in the `Location:` response header value.\n\nSending the same set of headers to subsequent hosts is in particular a problem\nfor applications that pass on custom `Authorization:` headers, as this header\noften contains privacy sensitive information or data that could allow others\nto impersonate the curl-using client's request.","affected":[{"ranges":[{"type":"SEMVER","events":[{"introduced":"6.0"},{"fixed":"7.58.0"}]},{"type":"GIT","repo":"https://github.com/curl/curl.git","events":[{"introduced":"ae1912cb0d494b48d514d937826c9fe83ec96c4d"},{"fixed":"af32cd3859336ab963591ca0df9b1e33a7ee066b"}]}],"versions":["7.57.0","7.56.1","7.56.0","7.55.1","7.55.0","7.54.1","7.54.0","7.53.1","7.53.0","7.52.1","7.52.0","7.51.0","7.50.3","7.50.2","7.50.1","7.50.0","7.49.1","7.49.0","7.48.0","7.47.1","7.47.0","7.46.0","7.45.0","7.44.0","7.43.0","7.42.1","7.42.0","7.41.0","7.40.0","7.39.0","7.38.0","7.37.1","7.37.0","7.36.0","7.35.0","7.34.0","7.33.0","7.32.0","7.31.0","7.30.0","7.29.0","7.28.1","7.28.0","7.27.0","7.26.0","7.25.0","7.24.0","7.23.1","7.23.0","7.22.0","7.21.7","7.21.6","7.21.5","7.21.4","7.21.3","7.21.2","7.21.1","7.21.0","7.20.1","7.20.0","7.19.7","7.19.6","7.19.5","7.19.4","7.19.3","7.19.2","7.19.1","7.19.0","7.18.2","7.18.1","7.18.0","7.17.1","7.17.0","7.16.4","7.16.3","7.16.2","7.16.1","7.16.0","7.15.5","7.15.4","7.15.3","7.15.2","7.15.1","7.15.0","7.14.1","7.14.0","7.13.2","7.13.1","7.13.0","7.12.3","7.12.2","7.12.1","7.12.0","7.11.2","7.11.1","7.11.0","7.10.8","7.10.7","7.10.6","7.10.5","7.10.4","7.10.3","7.10.2","7.10.1","7.10","7.9.8","7.9.7","7.9.6","7.9.5","7.9.4","7.9.3","7.9.2","7.9.1","7.9","7.8.1","7.8","7.7.3","7.7.2","7.7.1","7.7","7.6.1","7.6","7.5.2","7.5.1","7.5","7.4.2","7.4.1","7.4","7.3","7.2.1","7.2","7.1.1","7.1","6.5.2","6.5.1","6.5","6.4","6.3.1","6.3","6.2","6.1","6.0","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_1","curl-7_42_0","curl-7_41_0","curl-7_40_0","curl-7_39_0","curl-7_38_0","curl-7_37_1","curl-7_37_0","curl-7_36_0","curl-7_35_0","curl-7_34_0","curl-7_33_0","curl-7_32_0","curl-7_31_0","curl-7_30_0","curl-7_29_0","curl-7_28_1","curl-7_28_0","curl-7_27_0","curl-7_26_0","curl-7_25_0","curl-7_24_0","curl-7_23_1","curl-7_23_0","curl-7_22_0","curl-7_21_7","curl-7_21_6","curl-7_21_5","curl-7_21_4","curl-7_21_3","curl-7_21_2","curl-7_21_1","curl-7_21_0","curl-7_20_1","curl-7_20_0","curl-7_19_7","curl-7_19_6","curl-7_19_5","curl-7_19_4","curl-7_19_3","curl-7_19_2","curl-7_19_1","curl-7_19_0","curl-7_18_2","curl-7_18_1","curl-7_18_0","curl-7_17_1","curl-7_17_0","curl-7_17_0-preldapfix","curl-7_16_4","curl-7_16_3","curl-7_16_2","curl-7_16_1","curl-7_16_0","curl-7_15_6-prepipeline","curl-7_15_5","curl-7_15_4","curl-7_15_3","curl-7_15_2","curl-7_15_1","curl-7_15_0","curl-7_14_1","curl-7_14_0","curl-7_13_2","curl-7_13_1","before_ftp_statemachine","curl-7_13_0","curl-7_12_3","curl-7_12_2","curl-7_12_1","curl-7_12_0","curl-7_11_2","curl-7_11_1","curl-7_11_0","curl-7_10_8","curl-7_10_7","curl-7_10_6","curl-7_10_5","curl-7_10_4","curl-7_10_3","curl-7_10_2","curl-7_10_1","curl-7_10","curl-7_9_8","curl-7_9_7","curl-7_9_7-pre2","curl-7_9_6","curl-7_9_5","curl-7_9_5-pre4","curl-7_9_5-pre2","curl-7_9_4","curl-7_9_3","curl-7_9_3-pre3","curl-7_9_3-pre2","curl-7_9_3-pre1","curl-7_9_2","curl-7_9_1","curl-7_9","before_urldata_rename","curl-7_8_1","curl-7_8_1-pre3","curl-7_8","curl-7_8-pre2","curl-7_7_3","curl-7_7_2","curl-7_7_1","curl-7_7","curl-7_7-beta5","curl-7_7-beta3","curl-7_7-beta2","curl-7_7-beta1","curl-7_7_alpha2","curl-7_6_1","curl-7_6_1-pre3","curl-7_6_1-pre2","curl-7_6_1-pre1","curl-7_6","curl-7_6-pre4","curl_7_6-pre3","curl-7_5_2","curl-7_5","curl-7_4_1","curl-7_3","curl-7_2","curl-7_1_1","curl-6_5_2","curl-6_5_1","curl-6_5"],"database_specific":{"source":"https://curl.se/docs/CURL-CVE-2018-1000007.json","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"48607474506604002408974317231829063002","length":1840},"id":"CURL-CVE-2018-1000007-1443a279","signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/af32cd3859336ab963591ca0df9b1e33a7ee066b","target":{"file":"lib/http.c","function":"Curl_add_custom_headers"}},{"deprecated":false,"digest":{"line_hashes":["172811487286962788507795299819606904487","143931428984811263841805838476067883116","218751409249120975398093814939388710501","2725847305665497772859296005190120052"],"threshold":0.9},"id":"CURL-CVE-2018-1000007-45f98fb4","signature_type":"Line","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/af32cd3859336ab963591ca0df9b1e33a7ee066b","target":{"file":"lib/urldata.h"}},{"deprecated":false,"digest":{"function_hash":"338683229151875056059629533938515890912","length":1164},"id":"CURL-CVE-2018-1000007-574d4171","signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/af32cd3859336ab963591ca0df9b1e33a7ee066b","target":{"file":"lib/http.c","function":"Curl_http_output_auth"}},{"deprecated":false,"digest":{"function_h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Protected Credentials","id":"CWE-522"},"URL":"https://curl.se/docs/CVE-2018-1000007.json","affects":"both","last_affected":"7.57.0","package":"curl","severity":"Low","www":"https://curl.se/docs/CVE-2018-1000007.html"},"credits":[{"name":"Craig de Stigter","type":"FINDER"},{"name":"Daniel Stenberg","type":"REMEDIATION_DEVELOPER"}]}