CVE-2025-14819 — Improper Certificate Validation in Curl

CWE-295 — Improper Certificate Validation9 documents9 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 86.23%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Haxx CurlCurl
Timeline
PublishedJan 8
Latest updateFeb 25

Description

When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcurl find and accept a trust chain that it otherwise would not.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:NExploitability: 1.6 | Impact: 3.6

Affected Packages3 packages

▶NVDhaxx/curl7.87.0 — 8.18.0
▶Debianhaxx/curl< 8.18.0~rc3-1
▶CVEListV5curl/curl8.17.0 — 8.17.0+30

Patches

Patch: curl.se ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

3
CVEList
OpenSSL partial chain store policy bypass↗2026-01-08
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GHSA
GHSA-vqhr-m87q-9jqh: When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally re↗2026-01-08
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OSV
CVE-2025-14819: When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally re↗2026-01-08
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📋Vendor Advisories

3
Ubuntu
curl vulnerabilities↗2026-02-25
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Red Hat
curl: libcurl: Improper certificate validation due to cached TLS settings reuse↗2026-01-07
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Debian
CVE-2025-14819: curl - When doing TLS related transfers with reused easy or multi handles and altering ...↗2025
▶

🕵️Threat Intelligence

1
Wiz
CVE-2025-14819 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2025-14819 curl: libcurl: Improper certificate validation due to cached TLS settings reuse↗2025-12-31
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CVE-2025-14819 — Improper Certificate Validation | cvebase