cURL up to 8.17.0 libssh access control

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in cURL up to 8.17.0. It has been classified as critical. Impacted is an unknown function of the component libssh. This manipulation causes access control. This vulnerability appears as CVE-2025-15079. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in cURL up to 8.17.0. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component libssh. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2025-15079. The exploitation appears to be easy. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 282308 (Linux Distros Unpatched Vulnerability : CVE-2025-15079), 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 (282308) and CERT Bund (WID-SEC-2026-0030). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Amazon Linux 2
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • SUSE openSUSE
  • NetApp ActiveIQ Unified Manager
  • NetApp Data ONTAP
  • Open Source cURL
  • Tenable Security Nessus Network Monitor
  • Meinberg LANTIME
  • Open Source Notepad++
  • IBM AIX

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 5.3
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282308
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-15079

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
09/15/2026 +251 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-15079 (🔒)
GCVE (CVE): GCVE-0-2025-15079
GCVE (VulDB): GCVE-100-339883
CERT Bund: WID-SEC-2026-0030 - cURL: Mehrere Schwachstellen

Entryinfo

Created: 01/07/2026 13:17
Updated: 09/15/2026 09:39
Changes: 01/07/2026 13:17 (56), 01/08/2026 09:59 (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), 05/03/2026 01:50 (1), 09/15/2026 09:39 (12)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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