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Fencer Vulns
medium 5.3

CVE-2025-15079 json

libssh global known_hosts override

published 2026-01-08 10 mo ago modified 2026-10-14 25 d ago also EUVD-2026-1575 , GHSA-7q9p-cx8r-rh2q , JLSEC-2026-430

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenly accept connecting to hosts *not present* in the specified file if they were added as recognized in the libssh *global* known_hosts file.

Patch / fix

  • 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
  • curl Debian 14 8.18.0~rc3-1

debian advisories DEBIAN-CVE-2025-15079

  • curl Ubuntu 22.04 LTS 7.81.0-1ubuntu1.22
  • curl Ubuntu 24.04 LTS 8.5.0-2ubuntu10.7
  • curl Ubuntu Pro 18.04 LTS 7.58.0-2ubuntu3.24+esm7
  • curl Ubuntu Pro 20.04 LTS 7.68.0-1ubuntu2.25+esm2

ubuntu advisories UBUNTU-CVE-2025-15079

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 8.19.0-3.hum1
  • libcurl hummingbird 1 8.19.0-3.hum1
  • libcurl-minimal hummingbird 1 8.19.0-3.hum1

red hat advisories 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-2026:0508-1SUSE-SU-2026:20082-1SUSE-SU-2026:20110-1SUSE-SU-2026:20042-1SUSE-SU-2026:20062-1SUSE-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-2026:20031-1openSUSE-SU-2026:10017-1

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-2025-15079 updated cvss 8.1

curl: Host verification bypass during SSH transfers

  • 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 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal
    +6 more products
    Red Hat Enterprise Linux 9 curl, rust, cargo, clippy, libcurl, rustfmt, +14 more Red Hat Enterprise Linux 10 curl, rust, snphost, s390utils, trustee-guest-components Red Hat JBoss Core Services curl 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: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Hardened Images curl 8.19.0-3.hum1, libcurl 8.19.0-3.hum1, libcurl-minimal 8.19.0-3.hum1
    fixed: vendor fix RHSA-2026:6893
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3477116 referenced PoC, tagged "exploit" by a source, unverified

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
<8.20.0+0
8.20.0+0
julia LibCURL_jll
<8.18.0+0
8.18.0+0

Affected products

  • curl curl

Classification

Weakness
  • CWE-297 Improper Validation of Certificate with Host Mismatch

References

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.