CVE-2025-10966
CVE-2025-10966 is a medium-severity vulnerability in Haxx Curl with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-38240
- Affected product: Haxx Curl
- Published:
- Last modified:
Description
curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.
Frequently asked questions
- What is CVE-2025-10966?
- curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.
- How severe is CVE-2025-10966?
- CVE-2025-10966 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2025-10966 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-10966?
- CVE-2025-10966 affects Haxx Curl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-10966?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-10966 have an EU (EUVD) identifier?
- Yes. CVE-2025-10966 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38240.
- When was CVE-2025-10966 published?
- CVE-2025-10966 was published on 2025-11-07 and last updated on 2026-06-17.
References
- https://curl.se/docs/CVE-2025-10966.html
- https://curl.se/docs/CVE-2025-10966.json
- https://hackerone.com/reports/3355218
- http://www.openwall.com/lists/oss-security/2025/11/05/2
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
Affected products (1)
- cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
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