CVE-2025-4947

Description

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

Reserved 2025-05-19 | Published 2025-05-28 | Updated 2025-05-28 | Assigner curl

Problem types

CWE-295 Improper Certificate Validation

Product status

Default status
unaffected

8.13.0
affected

8.12.1
affected

8.12.0
affected

8.11.1
affected

8.11.0
affected

8.10.1
affected

8.10.0
affected

8.9.1
affected

8.9.0
affected

8.8.0
affected

Credits

Hiroki Kurosawa finder

Stefan Eissing remediation developer

References

curl.se/docs/CVE-2025-4947.json (json)

curl.se/docs/CVE-2025-4947.html (www)

hackerone.com/reports/3150884 (issue)

cve.org (CVE-2025-4947)

nvd.nist.gov (CVE-2025-4947)

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