{"id":"CURL-CVE-2026-92391","summary":"curl_mime_free stack overflow by recursion","details":"A deeply nested multipart MIME structure constructed via the public API causes\na stack overflow in libcurl during normal cleanup operations. An excessive\nrecursion depth within `curl_mime_free` leads to unbounded stack frame\nallocation during structure traversal, ultimately crashing the host process.","aliases":["CVE-2026-92391"],"modified":"2026-10-14T19:02:57.689321011Z","published":"2026-10-14T08:00:00Z","database_specific":{"CWE":{"id":"CWE-674","desc":"Uncontrolled Recursion"},"last_affected":"8.22.0","severity":"Low","package":"curl","affects":"lib","URL":"https://curl.se/docs/CVE-2026-92391.json","www":"https://curl.se/docs/CVE-2026-92391.html","issue":"https://hackerone.com/reports/4024222"},"affected":[{"ranges":[{"type":"SEMVER","events":[{"introduced":"7.56.0"},{"fixed":"8.14.3"},{"introduced":"8.15.0"},{"fixed":"8.16.2"},{"introduced":"8.17.0"},{"fixed":"8.20.2"},{"introduced":"8.21.0"},{"fixed":"8.23.0"}]},{"type":"GIT","repo":"https://github.com/curl/curl.git","events":[{"introduced":"ce0881edee3c78609eae49665fb70264d8786d29"},{"fixed":"d7546809d5bd548b69ec49fca26565c8f6f0d344"}]}],"versions":["8.22.0","8.21.0","8.20.0","8.19.0","8.18.0","8.17.0","8.16.0","8.15.0","8.14.1","8.14.0","8.13.0","8.12.1","8.12.0","8.11.1","8.11.0","8.10.1","8.10.0","8.9.1","8.9.0","8.8.0","8.7.1","8.7.0","8.6.0","8.5.0","8.4.0","8.3.0","8.2.1","8.2.0","8.1.2","8.1.1","8.1.0","8.0.1","8.0.0","7.88.1","7.88.0","7.87.0","7.86.0","7.85.0","7.84.0","7.83.1","7.83.0","7.82.0","7.81.0","7.80.0","7.79.1","7.79.0","7.78.0","7.77.0","7.76.1","7.76.0","7.75.0","7.74.0","7.73.0","7.72.0","7.71.1","7.71.0","7.70.0","7.69.1","7.69.0","7.68.0","7.67.0","7.66.0","7.65.3","7.65.2","7.65.1","7.65.0","7.64.1","7.64.0","7.63.0","7.62.0","7.61.1","7.61.0","7.60.0","7.59.0","7.58.0","7.57.0","7.56.1","7.56.0","curl-8_22_0","rc-8_22_0-3","rc-8_22_0-2","rc-8_22_0-1","curl-8_21_0","rc-8_21_0-3","rc-8_21_0-2","rc-8_21_0-1","curl-8_20_0","rc-8_20_0-3","rc-8_20_0-2","rc-8_20_0-1","curl-8_19_0","rc-8_19_0-3","rc-8_19_0-2","rc-8_19_0-1","curl-8_18_0","rc-8_18_0-3","rc-8_18_0-2","rc-8_18_0-1","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","tiny-curl-8_4_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","tiny-curl-7_72_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"],"database_specific":{"vanir_signatures":[{"id":"CURL-CVE-2026-92391-b188b21e","signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/d7546809d5bd548b69ec49fca26565c8f6f0d344","target":{"file":"lib/mime.c","function":"curl_mime_free"},"deprecated":false,"digest":{"length":246,"function_hash":"147015790001623118169778988213959787727"}},{"source":"https://github.com/curl/curl.git/commit/d7546809d5bd548b69ec49fca26565c8f6f0d344","target":{"file":"lib/mime.c"},"deprecated":false,"digest":{"line_hashes":["57523227017992825538861680299246726151","235298512336075810495430353730587201724","149174428003023240439562035389984792800","194586373621776060322319568173703186896","165023214495903260555809247722491267227","339409239735894207875603648592458215613","298233255040187266306825425890134574642","253562775739621764306820584197574962951","273773810375463775269106130766163028425","283773359174742849680717294069574109968","267021007761417785914595101524884943028","98469154856935114323558128740398398469","338777320260656735131466967687968609223","170843169790853384323054905520127915389","105124177904129793489143417724392077247"],"threshold":0.9},"id":"CURL-CVE-2026-92391-f31947a1","signature_type":"Line","signature_version":"v1"}],"vanir_signatures_modified":"2026-10-14T19:02:57Z","source":"https://curl.se/docs/CURL-CVE-2026-92391.json"}}],"schema_version":"1.9.0","credits":[{"name":"Joshua Rogers (Aisle Research)","type":"FINDER"},{"name":"Daniel Stenberg","type":"REMEDIATION_DEVELOPER"}]}