🛡️ CVE-2025-15079 on Debian — curl

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Distribution advisory

This page covers CVE-2025-15079 as tracked by Debian, for the package curl. The fix is available in version 8.18.0~rc3-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

DEBIAN-CVE-2025-15079 is classified as CWE-297: Improper Validation of Certificate with Host Mismatch. The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.

Affected software

DEBIAN-CVE-2025-15079 is recorded against 1 package.

  • curl (fixed in 8.18.0~rc3-1)

Timeline and source

Published on 8 January 2026 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2025-15079 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-01-08
Updated 2026-08-12
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
curl — 8.18.0~rc3-1

Vulnerability Monitoring

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