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CVE-2025-14819

OpenSSL partial chain store policy bypass

Published: Jan 8, 2026Updated: Jan 20, 2026 Sources: CVE List NVD BDUCWE-295
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.6%
Top 54.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:HPR:NUI:RS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-295

Affected Products

curlcurl
Library
OSS Libraries / generic-library
curlhaxxOSS Libraries
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
JBoss Core ServicesRed Hat Inc.
On-premDev Tool
DevTools & CI / ide-editor
OpenShift Container PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
curloss-projectUSOSS Librariesaka libcurl, wcurl
haxxoss-projectSEOSS Librariesaka haxx.se
red hat inc.commercialUSOperating Systemsaka red hat
and 8 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://curl.se/docs/CVE-2025-14819.json
curl.se
https://curl.se/docs/CVE-2025-14819.html
curl.se
http://www.openwall.com/lists/oss-security/2026/01/07/5
openwall.com
and 9 more references View all →

Timeline

Published
Jan 8, 2026
Last Updated
Jan 20, 2026

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