cURL up to 8.17.0 libssh improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in cURL up to 8.17.0. It has been declared as critical. The affected element is an unknown function of the component libssh. Such manipulation leads to improper authentication. This vulnerability is traded as CVE-2025-15224. An attack has to be approached locally. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in cURL up to 8.17.0. It has been rated as critical. Affected by this issue is some unknown processing of the component libssh. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication, curl would wrongly still ask and authenticate using a locally running SSH agent.

The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2025-15224. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 282312 (Linux Distros Unpatched Vulnerability : CVE-2025-15224), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.18.0 eliminates this vulnerability. The upgrade is hosted for download at curl.se. Applying the patch c92d2e14cfb0db662f958effd2ac86f99 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (282312) and CERT Bund (WID-SEC-2026-0030). Once again VulDB remains the best source for vulnerability data.

Affected

  • Fedora Linux
  • SUSE Linux
  • SUSE openSUSE
  • NetApp Data ONTAP
  • Open Source cURL
  • Tenable Security Nessus Network Monitor
  • Meinberg LANTIME

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282312
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-15224

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cURL 8.18.0
Patch: c92d2e14cfb0db662f958effd2ac86f99

Timelineinfo

01/07/2026 Advisory disclosed
01/07/2026 +0 days VulDB entry created
02/13/2026 +37 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-15224 (🔒)
GCVE (CVE): GCVE-0-2025-15224
GCVE (VulDB): GCVE-100-339884
CERT Bund: WID-SEC-2026-0030 - cURL: Mehrere Schwachstellen

Entryinfo

Created: 01/07/2026 13:17
Updated: 02/13/2026 16:39
Changes: 01/07/2026 13:17 (56), 01/08/2026 09:52 (2), 01/09/2026 12:54 (1), 01/09/2026 22:09 (7), 01/20/2026 12:54 (1), 02/13/2026 16:39 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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