medium 5.3

CVE-2025-14819 json

OpenSSL partial chain store policy bypass

published 2026-01-08 10 mo ago modified 2026-10-14 25 d ago also EUVD-2026-1566 , GHSA-vqhr-m87q-9jqh , JLSEC-2026-429

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

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.

Patch / fix

fixed in 3 distros 6 links 2

julia CURL_jll 8.20.0+0
julia LibCURL_jll 8.18.0+0
curl curl 8.14.2, 8.16.1, 8.18.0

debian ubuntu red hat suse opensuse alpine

curl Debian 12 7.88.1-10+deb12u15
curl Debian 13 8.14.1-2+deb13u4
curl Debian 14 8.18.0~rc3-1

debian advisories DEBIAN-CVE-2025-14819

curl Ubuntu 24.04 LTS 8.5.0-2ubuntu10.7
curl Ubuntu 25.10 8.14.1-2ubuntu1.1

ubuntu advisories UBUNTU-CVE-2025-14819

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

curl hummingbird 1 8.23.0-0.1.hum1
libcurl hummingbird 1 8.23.0-0.1.hum1
libcurl-minimal hummingbird 1 8.23.0-0.1.hum1
curl hummingbird 1 8.22.0-1.1.hum1
libcurl hummingbird 1 8.22.0-1.1.hum1
libcurl-minimal hummingbird 1 8.22.0-1.1.hum1
curl RHEL 10.2 8.12.1-4.el10_2.3
libcurl RHEL 10.2 8.12.1-4.el10_2.3

red hat advisories RHSA-2026:82895 RHSA-2026:77255 RHSA-2026:72506 RHSA-2026:55450 RHSA-2026:6893

curl SLE Micro 5.5, SLE Micro 5.4, SLE Micro 5.3 8.14.1-150400.5.77.1
curl SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8.14.1-160000.4.1
curl-mini SLES for SAP applications 16.0, SLES 16.0 8.14.1-160000.4.1
curl Linux Micro 6.0 8.14.1-3.1
curl Linux Micro 6.1 8.14.1-slfo.1.1_4.1
curl SLE Module for Basesystem 15 SP7 8.14.1-150700.7.8.1
curl SLE Micro 5.2 8.14.1-150200.4.97.1
curl openSUSE Leap 15.6 8.14.1-150600.4.34.1

suse advisories SUSE-SU-2026:0508-1 SUSE-SU-2026:20082-1 SUSE-SU-2026:20110-1 SUSE-SU-2026:20042-1 SUSE-SU-2026:20062-1 SUSE-SU-2026:0066-1

curl openSUSE Leap 16.0 8.14.1-160000.4.1
curl openSUSE Tumbleweed 8.18.0-1.1

opensuse advisories openSUSE-SU-2026:20031-1 openSUSE-SU-2026:10017-1

curl Alpine 3.21 8.14.1-r3
curl Alpine 3.22 8.14.1-r4
curl Alpine 3.24, Alpine 3.23 8.18.0-r0

alpine advisories ALPINE-CVE-2025-14819

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

curl.se/docs/CVE-2025-14819.html advisory
openwall.com/lists/oss-security/2026/01/07/5 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-14819 updated 2026-11-07 cvss 6.8

curl: libcurl: Improper certificate validation due to cached TLS settings reuse

Red Hat Confidential Compute Attestation build-of-trustee/trustee-rhel9, openshift-sandboxed-containers/osc-rhel9-operator, openshift-sandboxed-containers/osc-operator-bundle, openshift-sandboxed-containers/osc-podvm-builder-rhel9, openshift-sandboxed-containers/osc-podvm-payload-rhel9, confidential-compute-attestation-tech-preview/trustee-rhel9 Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/vector-rhel9, openshift-logging/fluentd-rhel9, openshift-logging/eventrouter-rhel9, openshift-logging/logging-view-plugin-rhel9, openshift-logging/cluster-logging-rhel9-operator, openshift-logging/log-file-metric-exporter-rhel9, +1 more Red Hat OpenShift Service Mesh 2 openshift-service-mesh/pilot-rhel8, openshift-service-mesh/grafana-rhel8, openshift-service-mesh/proxyv2-rhel9, openshift-service-mesh/istio-cni-rhel8, openshift-service-mesh/ratelimit-rhel8, openshift-service-mesh/istio-rhel8-operator, +2 more Red Hat Enterprise Linux 9 rust, cargo, clippy, rustfmt, snphost, rust-gdb, +10 more Red Hat Enterprise Linux 10 rust, snphost, s390utils, trustee-guest-components Red Hat JBoss Core Services curl

+3 more productsfewer

Red Hat OpenShift Container Platform 4 openshift4/recert-rhel9, openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Dev Spaces devspaces/code-rhel9 Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9

affected: no fix available “Fix deferred”
Red Hat Enterprise Linux AppStream (v. 10) libcurl-devel 8.12.1-4.el10_2.3, curl-debuginfo 8.12.1-4.el10_2.3, curl-debugsource 8.12.1-4.el10_2.3, libcurl-debuginfo 8.12.1-4.el10_2.3, libcurl-minimal-debuginfo 8.12.1-4.el10_2.3
fixed: vendor fix RHSA-2026:55450
Red Hat Enterprise Linux AppStream EUS (v. 10.0) libcurl-devel 8.12.1-1.el10_0.10, curl-debuginfo 8.12.1-1.el10_0.10, curl-debugsource 8.12.1-1.el10_0.10, libcurl-debuginfo 8.12.1-1.el10_0.10, libcurl-minimal-debuginfo 8.12.1-1.el10_0.10
fixed: vendor fix RHSA-2026:72506
Red Hat Enterprise Linux BaseOS (v. 10) curl 8.12.1-4.el10_2.3, libcurl 8.12.1-4.el10_2.3, libcurl-minimal 8.12.1-4.el10_2.3
fixed: vendor fix RHSA-2026:55450
Red Hat Enterprise Linux BaseOS EUS (v. 10.0) curl 8.12.1-1.el10_0.10, libcurl 8.12.1-1.el10_0.10, libcurl-minimal 8.12.1-1.el10_0.10
fixed: vendor fix RHSA-2026:72506
Red Hat Hardened Images curl 8.19.0-3.hum1, curl 8.22.0-1.1.hum1, curl 8.23.0-0.1.hum1, libcurl 8.19.0-3.hum1, libcurl 8.22.0-1.1.hum1, libcurl 8.23.0-0.1.hum1, +3 more
fixed: vendor fix RHSA-2026:6893
Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal Red Hat Enterprise Linux 9 curl, libcurl, curl-minimal, libcurl-minimal
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 10 mo ago (2026-01-08)

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.3	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
OSV	3.1	5.3	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
julia	CURL_jll	>=8.5.0+0, <8.20.0+0	8.20.0+0
julia	LibCURL_jll	>=7.87.0+0, <8.18.0+0	8.18.0+0

Affected products

curl curl

Classification

Weakness

CWE-295 Improper Certificate Validation

References

curl.se /docs/CVE-2025-14819.html
mitigation, patch, vendor-advisory, web
openwall.com /lists/oss-security/2026/01/07/5
mailing-list, mitigation, patch, third-party-advisory, web
curl.se /docs/CVE-2025-14819.json
vendor-advisory, web
github.com /advisories/GHSA-vqhr-m87q-9jqh
web
nvd.nist.gov /vuln/detail/CVE-2025-14819
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary