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Fencer Intel
medium 4.3

CVE-2025-10966 json

missing SFTP host verification with wolfSSH

published last yr. modified 23d ago also EUVD-2025-38240 , GHSA-5gff-h54g-38r2 , JLSEC-2026-424

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms.

This prevents curl from detecting MITM attackers and more.

Patch / fix

  • julia CURL_jll 8.17.0+0
  • julia LibCURL_jll 8.17.0+0
  • curl curl 8.14.2, 8.16.1
  • Siemens RUGGEDCOM RST2428P V4.0
  • curl Debian 14 8.17.0~rc2-1

debian advisories DEBIAN-CVE-2025-10966

  • 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 openSUSE Tumbleweed 8.17.0-1.1

opensuse advisories openSUSE-SU-2025:15757-1

  • curl Alpine 3.24, Alpine 3.23 8.17.0-r0

alpine advisories ALPINE-CVE-2025-10966

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

  • cmake Azure Linux 3.0 3.30.3-12

azure linux advisories AZL-69748

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-10966 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2025-10966 updated cvss 5.9

curl: Curl missing SFTP host verification with wolfSSH backend

  • 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 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 Red Hat Enterprise Linux 10 curl Red Hat JBoss Core Services curl
    +3 more products
    Red Hat OpenShift Container Platform 4 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
    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
last yr.

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3355218 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
julia CURL_jll
<8.17.0+0
8.17.0+0
julia LibCURL_jll
>=7.70.0+0, <8.17.0+0
8.17.0+0

Affected products

  • curl curl
  • Siemens RUGGEDCOM RST2428P

Classification

Weakness
  • CWE-322 Key Exchange without Entity Authentication

References

Sources

Fencer Intel 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.