How severe is CVE-2025-15079?

CVE-2025-15079 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-15079 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15079?

CVE-2025-15079 affects Haxx Curl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15079?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-15079 have an EU (EUVD) identifier?

Yes. CVE-2025-15079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1575.

When was CVE-2025-15079 published?

CVE-2025-15079 was published on 2026-01-08 and last updated on 2026-06-17.

CVE-2025-15079

CVE-2025-15079 is a medium-severity vulnerability in Haxx Curl with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-297.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1575
Weakness: CWE-297
Affected product: Haxx Curl
Published: 2026-01-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-15079?: 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.
How severe is CVE-2025-15079?: CVE-2025-15079 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-15079 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15079?: CVE-2025-15079 affects Haxx Curl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15079?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15079 have an EU (EUVD) identifier?: Yes. CVE-2025-15079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1575.
When was CVE-2025-15079 published?: CVE-2025-15079 was published on 2026-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

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