{"id":"CVE-2025-14819","title":"When doing TLS related transfers with reused easy or multi handles and\naltering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally\nreuse a CA store cached in memory for which the partial chain option was\nreversed","summary":"When doing TLS related transfers with reused easy or multi handles and\naltering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally\nreuse a CA store cached in memory for which the partial chain option was\nreversed. Contra…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-295"],"vendor":"haxx","product":"curl","affected":["curl >= 7.87.0, < 8.18.0"],"patched":["curl 8.18.0"],"published":"2026-01-08","updated":"2026-09-15","sourceUpdated":"2026-09-15T07:16:24.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-14819","references":[{"url":"https://curl.se/docs/CVE-2025-14819.html","label":"2499f714-1537-4658-8207-48ae4bb9eae9"},{"url":"https://curl.se/docs/CVE-2025-14819.json","label":"2499f714-1537-4658-8207-48ae4bb9eae9"},{"url":"http://www.openwall.com/lists/oss-security/2026/01/07/5","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-01-08T15:00:02.949618Z"},"epss":0.00739,"epssPercentile":0.53109,"ingestedAt":"2026-09-15T07:33:29.259Z","slug":"CVE-2025-14819","body":"## Overview\n\nWhen doing TLS related transfers with reused easy or multi handles and\naltering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally\nreuse a CA store cached in memory for which the partial chain option was\nreversed. Contrary to the user's wishes and expectations. This could make\nlibcurl find and accept a trust chain that it otherwise would not.\n\n## Affected\n\n- `curl >= 7.87.0, < 8.18.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `curl 8.18.0`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}