OpenSSL partial chain store policy bypass

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-14819
StatePUBLISHED
Assignercurl
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-08 10:15:46 UTC
Updated2026-09-15 07:16:24 UTC
DescriptionWhen 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Problem Types: CWE-295 | CWE-295 Improper Certificate Validation | CWE-295 CWE-295 Improper Certificate Validation

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Haxx Curl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Curl Curl affected 7.87.0 8.14.2 semver Not specified
CNA Curl Curl affected 8.15.0 8.16.1 semver Not specified
CNA Curl Curl affected 8.17.0 8.18.0 semver Not specified
CNA Curl Curl affected 3c16697ebd796f799227be293e8689aec5f8190d cd046f6c93b39d673a58c18648d8906e954c4f5d git Not specified
CNA Curl Curl affected 8.17.0 Not specified
CNA Curl Curl affected 8.16.0 Not specified
CNA Curl Curl affected 8.15.0 Not specified
CNA Curl Curl affected 8.14.1 Not specified
CNA Curl Curl affected 8.14.0 Not specified
CNA Curl Curl affected 8.13.0 Not specified
CNA Curl Curl affected 8.12.1 Not specified
CNA Curl Curl affected 8.12.0 Not specified
CNA Curl Curl affected 8.11.1 Not specified
CNA Curl Curl affected 8.11.0 Not specified
CNA Curl Curl affected 8.10.1 Not specified
CNA Curl Curl affected 8.10.0 Not specified
CNA Curl Curl affected 8.9.1 Not specified
CNA Curl Curl affected 8.9.0 Not specified
CNA Curl Curl affected 8.8.0 Not specified
CNA Curl Curl affected 8.7.1 Not specified
CNA Curl Curl affected 8.7.0 Not specified
CNA Curl Curl affected 8.6.0 Not specified
CNA Curl Curl affected 8.5.0 Not specified
CNA Curl Curl affected 8.4.0 Not specified
CNA Curl Curl affected 8.3.0 Not specified
CNA Curl Curl affected 8.2.1 Not specified
CNA Curl Curl affected 8.2.0 Not specified
CNA Curl Curl affected 8.1.2 Not specified
CNA Curl Curl affected 8.1.1 Not specified
CNA Curl Curl affected 8.1.0 Not specified
CNA Curl Curl affected 8.0.1 Not specified
CNA Curl Curl affected 8.0.0 Not specified
CNA Curl Curl affected 7.88.1 Not specified
CNA Curl Curl affected 7.88.0 Not specified
CNA Curl Curl affected 7.87.0 Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/01/07/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Mitigation, Patch, Third Party Advisory
curl.se/docs/CVE-2025-14819.json 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se Vendor Advisory
curl.se/docs/CVE-2025-14819.html 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se Mitigation, Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Stanislav Fort (Aisle Research) (en)

CNA: Daniel Stenberg (en)

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