{"id":"CURL-CVE-2026-13608","summary":"OpenLDAP SASL authentication bypass","details":"A flaw in the libcurl SASL negotiation for LDAP authentication allows an\nincomplete handshake sequence to be misinterpreted as a successful\ncryptographic verification. An attacker executing a Man-in-the-Middle (MITM)\nattack can inject a premature or shortcut response that bypasses complete peer\nvalidation.","aliases":["CVE-2026-13608"],"modified":"2026-09-02T08:04:19.827580Z","published":"2026-09-02T08:00:00Z","database_specific":{"package":"curl","severity":"Low","www":"https://curl.se/docs/CVE-2026-13608.html","CWE":{"desc":"Improper Restriction of Communication Channel to Intended Endpoints","id":"CWE-923"},"URL":"https://curl.se/docs/CVE-2026-13608.json","affects":"both","issue":"https://hackerone.com/reports/3822248","last_affected":"8.21.0"},"affected":[{"ranges":[{"type":"SEMVER","events":[{"introduced":"7.82.0"},{"fixed":"8.22.0"}]},{"type":"GIT","repo":"https://github.com/curl/curl.git","events":[{"introduced":"eeca818b1e8d1e61c2d4d833aed56ce4c510a9d4"},{"fixed":"ea71c3b6b60e563651ea8596a975aef0c8199519"}]}],"versions":["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","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"],"database_specific":{"source":"https://curl.se/docs/CURL-CVE-2026-13608.json","vanir_signatures_modified":"2026-09-02T08:04:19Z","vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["326639408536088429782387452173430813488","309793192306506390906797793866759243868","25094943265867132959496315694728531457","131351165008478471621245708616349825336","194811653429796140974907197863500476284"],"threshold":0.9},"id":"CURL-CVE-2026-13608-2ddb3aa2","signature_type":"Line","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/ea71c3b6b60e563651ea8596a975aef0c8199519","target":{"file":"lib/openldap.c"}},{"id":"CURL-CVE-2026-13608-cc8eade8","signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/ea71c3b6b60e563651ea8596a975aef0c8199519","target":{"file":"lib/openldap.c","function":"oldap_state_sasl_resp"},"deprecated":false,"digest":{"function_hash":"241857058883287100469178053667771510182","length":713}}]}}],"schema_version":"1.9.0","credits":[{"name":"Eunsoo Kim (Autonomous Code Security team at Microsoft)","type":"FINDER"},{"name":"Eunsoo Kim","type":"REMEDIATION_DEVELOPER"}]}