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Fencer Intel
medium 6.5

CVE-2025-4947 json

QUIC certificate check skip with wolfSSL

published last yr. modified 3mo ago also EUVD-2025-16303 , GHSA-ppfq-jg49-mqj4 , JLSEC-2026-432

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

Patch / fix

  • julia CURL_jll 8.14.1+0
  • julia LibCURL_jll 8.14.1+0
  • haxx curl 8.14.0
  • curl Debian 14, Debian 13 8.14.0-1

debian advisories DEBIAN-CVE-2025-4947

  • curl SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 8.14.1-150600.4.28.1
  • curl Linux Micro 6.1 8.14.1-slfo.1.1_1.1

suse advisories SUSE-SU-2025:03198-1SUSE-SU-2025:20675-1

  • curl openSUSE Tumbleweed 8.14.0-1.1

opensuse advisories openSUSE-SU-2025:15176-1

  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 8.14.0-r0

alpine advisories ALPINE-CVE-2025-4947

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 3.30.3-7

azure linux advisories AZL-62055

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-2025-4947 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-2025-4947 updated cvss 6.5

libcurl: curl: QUIC certificate check skip with wolfSSL

  • Red Hat Confidential Compute Attestation confidential-compute-attestation-tech-preview/trustee-rhel9 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, rust, cargo, clippy, libcurl, rustfmt, +14 more Red Hat Enterprise Linux 10 curl, rust, snphost, trustee-guest-components
    +3 more products
    Red Hat JBoss Core Services curl Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3150884 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
julia CURL_jll
>=8.9.0+0, <8.14.1+0
8.14.1+0
julia LibCURL_jll
>=8.8.0+0, <8.14.1+0
8.14.1+0

Affected products

  • curl curl

Classification

Weakness
  • CWE-295 Improper Certificate Validation

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.