{"id":"CVE-2026-13608","title":"A flaw in the libcurl SASL negotiation for LDAP authentication allows an\nincomplete handshake sequence to be misinterpreted as a successful\ncryptographic verification","summary":"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 …","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-923","CWE-347"],"vendor":"haxx","product":"curl","affected":["curl >= 7.82.0, < 8.22.0"],"patched":["curl 8.22.0"],"published":"2026-09-06","updated":"2026-09-15","sourceUpdated":"2026-09-15T07:16:26.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-13608","references":[{"url":"https://curl.se/docs/CVE-2026-13608.html","label":"2499f714-1537-4658-8207-48ae4bb9eae9"},{"url":"https://curl.se/docs/CVE-2026-13608.json","label":"2499f714-1537-4658-8207-48ae4bb9eae9"},{"url":"https://hackerone.com/reports/3822248","label":"2499f714-1537-4658-8207-48ae4bb9eae9"},{"url":"https://hackerone.com/reports/3822248","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13608.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-13608"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529198"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-13608"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13608"},{"url":"https://access.redhat.com/errata/RHSA-2026:63514"},{"url":"https://access.redhat.com/errata/RHSA-2026:63161"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","score-dispute"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-08T15:39:09.395825Z"},"epss":0.00644,"epssPercentile":0.49525,"ingestedAt":"2026-09-07T09:08:15.325Z","scores":{"nvd":7.4,"vendor":3.7},"slug":"CVE-2026-13608","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `curl >= 7.82.0, < 8.22.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `curl 8.22.0`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Hardened Images, Red Hat Satellite 6 · no fix planned: Red Hat Satellite 6, Red Hat Enterprise Linux 10, Red Hat Hardened Images · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13608.json)\n- **RHSA-2026:63514** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:63514)\n- **RHSA-2026:63161** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:63161)","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":4950,"id":"CVE-2026-13608","ts":1788887218779,"field":"exploit_available","old":"false","new":"true"},{"seq":4949,"id":"CVE-2026-13608","ts":1788887218779,"field":"cvss","old":null,"new":"7.4"},{"seq":4948,"id":"CVE-2026-13608","ts":1788887218779,"field":"severity","old":"none","new":"high"},{"seq":3833,"id":"CVE-2026-13608","ts":1788886351693,"field":"exploit_available","old":"true","new":"false"},{"seq":3832,"id":"CVE-2026-13608","ts":1788886351693,"field":"cvss","old":"7.4","new":null},{"seq":3831,"id":"CVE-2026-13608","ts":1788886351693,"field":"severity","old":"high","new":"none"},{"seq":3288,"id":"CVE-2026-13608","ts":1788885294173,"field":"exploit_available","old":"false","new":"true"},{"seq":3287,"id":"CVE-2026-13608","ts":1788885294173,"field":"cvss","old":null,"new":"7.4"},{"seq":3286,"id":"CVE-2026-13608","ts":1788885294173,"field":"severity","old":"none","new":"high"}]}